Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cef5485e65b6311…

MALICIOUS

PDF

49.8 KB Created: 2020-08-11 09:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 499bebe0fc7e8045a3e10e1d8546d6f8 SHA-1: 76b2e3093c4b742e024e956fe7fe5c0fbddaf5f6 SHA-256: 7cef5485e65b6311633c8fcdb92fb88c10b6d6fccbbe3e63ab545095d6d19c22
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a malicious redirector. This redirector, 'https://ttraff.cc/pify?keyword=calendar+2020+cute+pdf', is designed to phish users by presenting a seemingly innocuous lure. The presence of a link farm and the ML classifier's high confidence score further support the malicious nature of this document.

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=calendar+2020+cute+pdf In PDF document text
    • http://miruf.csinsf.org/uploads/1/3/0/8/130814921/4f94e3b4f4efe0b.pdfIn PDF document text
    • http://files.dogwooddoodlebugs.com/uploads/1/3/1/4/131406843/307724.pdfIn PDF document text
    • http://bigex.andrewpevny.com/uploads/1/3/0/7/130776031/katasiru-sebedamosivun.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/1/0430/3480/4375/files/26472760164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/75984473031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/sekin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/siwuvok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/buell_blast_500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/xibositopozuzuzux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/rusirasojutavinigakuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/45544169787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0803/1893/files/29370941726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6871/7216/files/framework_for_marketing_management_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/schoolboy_q_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5033/5384/files/pan_card_online_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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

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_off000082cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CD 5152 bytes
SHA-256: caaa59ba0f8f43d08cacfa990aa59243e83777d6e412fd37d1c0a6566b5302ce
font_01_sfnt_off00009460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 11052 bytes
SHA-256: 62b63ba63577b3682b8a8c1811d3912b9b5f5adb0909b5c3e7d595d7345000e6

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