Malicious PDF — malware analysis report

Static analysis result for SHA-256 b018ccfdb9fe826c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 07:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7174ac3c16dde04a56f372b17d3bdc7 SHA-1: e57ef5a6267630dc7d2fe33b4ee537279b2df54d SHA-256: b018ccfdb9fe826c5f4c2bc943fc36128a07809e218e9e4d69f634a722df83ad
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an offer for 'Carrom Pool unlimited coins and gems apk'. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a lure for a popular mobile game.

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=carrom+pool+unlimited+coins+and+gems+apk
    • http://files.blue-sky-coach.com/uploads/1/3/0/9/130969936/816135.pdf
    • http://files.suelacy.com/uploads/1/3/1/6/131636890/rasuvitigaxiwob-papubugaxi-keduwolubuko-vojozesuremog.pdf
    • http://files.kairakunda.com/uploads/1/3/0/9/130969790/kedugepek-vopijozim.pdf
    • http://files.marcyearthscience.com/uploads/1/3/0/7/130738970/sefetexavevogin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/applied_linguistics_branches.pdf
    • https://cdn.shopify.com/s/files/1/0451/1966/8377/files/archery_king_mod_apk_game.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/18863723818.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/grave_of_the_fireflies_full_movie_kissanime.pdf
    • https://cdn.shopify.com/s/files/1/0430/6996/4439/files/63639352418.pdf
    • https://cdn.shopify.com/s/files/1/0440/0444/2262/files/sapupesefosumijikasome.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/vinirurutinuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/puzaz.pdf
    • https://cdn.shopify.com/s/files/1/0447/8219/0749/files/best_practice_guidelines_nursing_canada.pdf
    • https://cdn.shopify.com/s/files/1/0453/8669/4824/files/catalase_assay_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2873/files/html_to_java_free.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_off000067ab.bin
c89c960f5c367332ecde6e6dda11a3cfec017cbac51d354d45745ea4696f82d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 5360 bytes
font_01_sfnt_off000079ce.bin
358e521f345c6050a7c84547f7c39dc1222d97e96b39d1789de6a6588d8aeb38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CE 9900 bytes

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