Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c804d82eb45ecc1…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 03:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c06129e19011020e42ea1026e2117e1 SHA-1: ae6b7144d0968a2ca66b70aaea094652ecb9eb7f SHA-256: 0c804d82eb45ecc127483a6bb926546abaf976a9aeff8768e9a32d145281174b
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed to host SEO-optimized PDF files. One of these links, presented as 'adjective or adverb worksheets pdf', redirects to a known malicious domain (ttraff.cc). This suggests a phishing or redirection campaign, likely using the document as a lure to drive traffic to malicious sites.

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.
  • 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=adjective+or+adverb+worksheets+pdf
    • http://files.milaraphael.com/uploads/1/3/0/7/130776611/ripopujewodi_xifozarupi_relosimoximos.pdf
    • http://files.educationsymposium2019.com/uploads/1/3/1/4/131406274/6817c6637f9e895.pdf
    • http://files.racetherockstar.com/uploads/1/3/1/3/131380786/kixefuterudasezakuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/siberab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/10381719479.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/nibifokewubid.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/zegulipomarudaxivis.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/lijedot.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/5590791483.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/70391437967.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/pekuwijeno.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/rodusalarelukira.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/ziperan.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/41355542541.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/24855236584.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007705.bin
751fb8480f4dd859caca3fe1b8a40ffbe4eed46e5df6ab9b1a0da411b6c6e5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 5316 bytes
font_01_sfnt_off0000893c.bin
10533cb8748b84f98456ebcf6f98f5f21bfa0b5a6722e29285b17098564043a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x893C 10088 bytes

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