Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c062279936466e…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 01:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e96ccf47fd1173945d44a9113f0a8718 SHA-1: bc1590544ef8a08d0a7427a56da57f52cda320e6 SHA-256: 76c062279936466e89d8603626411efe23036ae1b498a11a68763e701ade716e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=amman+devotional+hd+video+songs+free'. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=amman+devotional+hd+video+songs+free
    • http://files.medium-shelleyjones.com/uploads/1/3/0/7/130775786/79db0331.pdf
    • http://files.katscho.com/uploads/1/3/0/7/130776272/5673747.pdf
    • http://files.cruisediamondhead.com/uploads/1/3/0/9/130969801/64b3f92.pdf
    • http://files.nicolaulrichs.com/uploads/1/3/2/7/132710694/2703838.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/wonobefix.pdf
    • https://cdn.shopify.com/s/files/1/0457/8118/8774/files/86753620738.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/lusawekeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/91653683524.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/tujotuset.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/carnatic_music_lessons_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/1st_amendment_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2932/files/bluecoat_academy_nottingham_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0551/files/41546128689.pdf
    • https://cdn.shopify.com/s/files/1/0439/7858/8318/files/surah_yasin_dan_tahlil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3493/5447/files/dunodixomiwurujube.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bca.bin
822b69b57c4a01854451dd3576915d2cb7a7d269b3a56086c51338197efb5ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCA 5372 bytes
font_01_sfnt_off00005de0.bin
16b702c30c03e65aceb2ef57afaf0deaa83ec2a315bfc9504b8eafdc530881c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE0 8688 bytes
font_02_sfnt_off00007645.bin
d7bfa22af2542570bb69599b2bbc20a61739e1fd7df1373b0b8b50988adb230a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7645 13236 bytes

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