Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd11a1513a0a2a6…

MALICIOUS

PDF

54.5 KB Created: 2020-08-29 05:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31219e1b22b367cc8a735d5d06c31382 SHA-1: 44484899f04633a6790f5ab76cc3cdd1dd42c15d SHA-256: 4bd11a1513a0a2a6801f4380b3935d099b0fd2740c5c6c7b1b7bf97ef662181a
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The presence of a link to 'ttraff.com' suggests a redirection to a potentially harmful site, likely for phishing or malware delivery. The document body contains obfuscated text and URLs, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=ww2+soe+bbc In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_251e178c3aa6475792d1a5ede13eb36a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a939c1e33d81480ca36b718dde4ebfaf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7f598550e17d4b59a95388f01a911b41.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2e9a9fe8aa6e453db35ad9a405b7683c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f54b854553234c98a5bf2eab1b696b55.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/81659595113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/kirememefuxid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/arabic_language_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8098/1407/files/55325404625.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/mujepujobewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/zuletexulezozofexukin.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
    • 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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 2908 bytes
SHA-256: c6017a6d86a855746cc3374208884d3bb344ce5192612ec9a4311c37ea481331
font_01_sfnt_off00007c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0D 4832 bytes
SHA-256: 03f2cd5658453d3a6a2fbf28cbbddc5890bb7e9a3bde4b3a0297f4f57bec2e86
font_02_sfnt_off00008cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 13600 bytes
SHA-256: 00e1df79d757145921e46acf6df185863915c37cd5959a021520d5bd0cf8bf49
font_03_sfnt_off0000b787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB787 16240 bytes
SHA-256: 11e334e115a4fea62abf2c12469912cdf41ec160efd7ada20e069e2f5c0f483a

Open this report in the interactive analyzer, or submit your own file for analysis.