Malicious PDF — malware analysis report

Static analysis result for SHA-256 374b764aecf39c04…

MALICIOUS

PDF

52.5 KB Created: 2020-08-04 06:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28b8a52117b42754e57a3c4e3d3ea7de SHA-1: 076f47088538cdb909a02c64bb2ee387f5c48b6d SHA-256: 374b764aecf39c0433fbef7aaf405c53f66a5eff868d2d28c8341ff7a6b47960
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics and IOCs. This suggests the document's purpose is to trick users into visiting the malicious redirector by presenting it as a programming tutorial.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=programming+in+java+tutorial+point+pdf In PDF document text
    • http://files.jason-hoelscher.com/uploads/1/3/0/9/130969082/warovoxan.pdfIn PDF document text
    • http://files.lovelivesfoundation.com/uploads/1/3/1/6/131606094/lipenimebafu.pdfIn PDF document text
    • http://files.joplatesnweights.com/uploads/1/3/0/9/130969885/5ae01475c89237.pdfIn PDF document text
    • http://files.andersonsallstars.com/uploads/1/3/0/7/130739387/4c4bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/xogonar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/foserinemokixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/51310274635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/43482750113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/timber_mod_1._7._10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/nogusesulamuxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/44714826359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2988/1244/files/wosuvuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/10811708698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/71024160290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/appropriate_preposition_list_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F70 6568 bytes
SHA-256: 18f4960a52d64bc83d6c304eee4b25c9ca37eec54c0f4efd5701b5568bea1fd1
font_01_sfnt_off00006fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 5320 bytes
SHA-256: 97121bc69603d274c0b4e6e4a039878d72119372bc53a88ced8fa02abb0dc1fe
font_02_sfnt_off000081c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C9 1804 bytes
SHA-256: d9c0a6c11b05c4a851b04fea94498496aa899470d307513bb991c37a842bde18
font_03_sfnt_off00008aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA7 10576 bytes
SHA-256: 470fe8e781373d08deb0ebf43e5dc1336eef35410cd13f70638da329d2504c57
font_04_sfnt_off0000aecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECF 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f