Malicious PDF — malware analysis report

Static analysis result for SHA-256 accd7b054c1dff2a…

MALICIOUS

PDF

50.9 KB Created: 2020-08-23 14:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5513528919c432df26393a1d52a04b8 SHA-1: 53c967bd30f0575d42c1df64f3cd5e31ebcea36b SHA-256: accd7b054c1dff2afa8b926be690f27f3fc0667c6de8ea8cb8e1e50d5315ac3e
150 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a link farm. The primary malicious URL is 'https://ttraff.cc/pify?keyword=acg+guidelines+gi+bleed', which is likely used to redirect users to a phishing or malware-hosting site. The presence of numerous external PDF links, many hosted on shopify.com, suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=acg+guidelines+gi+bleed
    • http://dunavo.retrochem.com/uploads/1/3/1/4/131412290/titimosorevi_xizik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/pixarimatopexavebufegej.pdf
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/sap_basis_administration.pdf
    • https://cdn.shopify.com/s/files/1/0434/8428/3033/files/62717073937.pdf
    • https://cdn.shopify.com/s/files/1/0435/4021/8015/files/tozeduvelubetavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/ultimate_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/pizunojojomakub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/razer_booster_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/comment_fusionner_2_en_un_seul_document.pdf
    • https://cdn.shopify.com/s/files/1/0432/1850/1799/files/play_sims_online_without_download.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bb2.bin
4c6f61bae1c255eb60cb093ad63ed4bc0bfd457381a07f76ecdbbe76841355d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB2 4932 bytes
font_01_sfnt_off00009c7f.bin
7c51848bb0cef164539bf9fb2d070bdbfab6418233853351421ea94b21aec797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7F 10136 bytes

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