Malicious PDF — malware analysis report

Static analysis result for SHA-256 55653f81aa897c1f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 06:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 291151903c0909cb436f9e07a77ea255 SHA-1: cd28d72fa83dcf8487e5ae6f228907fe96da26a5 SHA-256: 55653f81aa897c1f97d07314e815e73b1fdbbec022c0ab8072cc3cf90f44beda
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=avid+media+composer+8.+9+free'. This indicates the document is designed to trick users into clicking a link, likely under the guise of a software download as suggested by the document body and the 'SE_DOWNLOAD_BUTTON' heuristic. The PDF also contains a link farm, further supporting a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=avid+media+composer+8.+9+free In PDF document text
    • http://files.visionquilt.org/uploads/1/3/1/4/131482819/7dca44f6f.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/1/0435/5912/5160/files/baldomero_lillo_sub_sole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/69307092003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/visokukeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/23496518011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/27999144148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/200_times_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/41820046786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/85397512660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5016/2581/files/xaruxorogilud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/rewulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/c._s._lewis_the_lion_the_witch_and_the_wardrobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/igitabo_cy_amategeko_ahana_mu_rwanda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/61500326318.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5700 bytes
SHA-256: d148eddfa2fa1f7bbdea603942d5d4d0399654003de01ed9c708177242f041d1
font_01_sfnt_off00007502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 11424 bytes
SHA-256: 0c4305f4eca045ba26471a5b27c01056c2978b98f7f5185fda9100cd7fce8936

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