Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad35b103b48e7e6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 01:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e4d0f80e48ca67cfec9a785a246493ee SHA-1: f48ef278c016ebcf0d7d85c13cc990d06cbfb74d SHA-256: cad35b103b48e7e68049b95e2d7b819888a51d2189fd47894cf7db273e95fd8e
234 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=zarchiver+pro+apk+free'. Additionally, it exhibits a PDF SEO link farm pattern with numerous links to Shopify-hosted PDFs. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters. The document body contains obfuscated text but includes the same malicious URL and benign-looking PDF links, reinforcing the lure.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=zarchiver+pro+apk+free In PDF document text
    • http://files.seedssown.org/uploads/1/3/1/6/131637362/9045030.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/1/0429/7749/3146/files/75240690117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/fupoxofekunisokobixonir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/66814891150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/vidmate_hd_video_music_er_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/33791862348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/crazy_frog_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/13255509213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1547/files/bhairavar_kavasam_lyrics_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugomedimugatusigoxafif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/piriformis_muscle_stretches_while_pregnant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/63639886581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/matlab_vs_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/korean_characters_chart.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_off00005f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F46 4976 bytes
SHA-256: 2b4f2cf5a0c110b320f2b5fbe3c1e6c0c8473e4a1a51f5a8ce22974ec7cddf3f
font_01_sfnt_off0000703a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x703A 10192 bytes
SHA-256: 2a09a2da468d434003f0203e221e4640b560c7b9369d784fdcd9ae86c334cb1b

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