Malicious PDF — malware analysis report

Static analysis result for SHA-256 409e44b74d1d0230…

MALICIOUS

PDF

49.6 KB Created: 2020-08-08 00:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a86e0e53b3f39c98de639e0427d8997b SHA-1: 9f8788788f6841220db6703e0a72dcab62136b85 SHA-256: 409e44b74d1d0230cecd4ef94d29accf45153874703962d70e53f3d522e7664e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a prominent link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, includes text suggesting a lure for downloading PDF notes. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering via a deceptive link.

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.cc/pify?keyword=carbohydrates+notes+pdf+download In PDF document text
    • http://files.inspiredbygeology.com/uploads/1/3/0/9/130969632/rijujixunolino.pdfIn PDF document text
    • http://files.photoguy1057.com/uploads/1/3/2/7/132710627/28470.pdfIn PDF document text
    • http://files.mars-hill-press.com/uploads/1/3/0/7/130740530/nexavasenozesaf-zupore.pdfIn PDF document text
    • http://files.childrenscoalitionac.org/uploads/1/3/2/7/132740182/betopi.pdfIn PDF document text
    • http://files.dujardinbeauty.com/uploads/1/3/0/9/130969429/bonixarabopo_dumafi_remisakalop_jimigape.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/1/0443/0325/3660/files/pdf_file_size_reduce_150_kb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/gexizik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/56390827743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/webwatcher_mobile_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1160/9500/files/nuwave_oven_manual_cookbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/62361957968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/30200645693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/33979622961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/gw2_scribe_guide.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
    • 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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000734b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 5368 bytes
SHA-256: 20e0c5e71ae12d509b92427e2382218cdfa10bb21bb5acf1f029922cbd0cd227
font_01_sfnt_off00008552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8552 6364 bytes
SHA-256: 1fd3e9b2783c459340f3a7734a2a1969c5f9c129ff7f41e215409ae220916549
font_02_sfnt_off000094ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EF 10536 bytes
SHA-256: 9f600a7880ce8d56c367ebbbe628e5deffc8fa51d85fcf37c680301175813226

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