Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e936d6dcd0784f…

MALICIOUS

PDF

46.6 KB Created: 2020-08-01 21:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b41abb9cbb39563fb7745e8ce9197719 SHA-1: 54143e08c3e1e0553c6d00c3f99bb7c67341c92f SHA-256: 11e936d6dcd0784f7618140d9d8cc358c8a42991b1b7a8add4cce5ff4387bff7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document also contains a large number of links to other PDFs hosted on various domains, suggesting a link farm or a method to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=pandas+reorder+columns
    • http://files.accordeon.co/uploads/1/3/1/4/131483305/6319737.pdf
    • http://files.al-anon-orangecountyny.org/uploads/1/3/1/4/131452806/7756443.pdf
    • http://files.presbyteryoflothian.org.uk/uploads/1/3/0/9/130969003/bimerap.pdf
    • http://files.tidewatersoaring.org/uploads/1/3/2/7/132740586/fe86eb8be706c22.pdf
    • http://files.blingattiphanys.com/uploads/1/3/1/1/131163846/8613768.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/46336083364.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/96465142886.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6110/files/basatabol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/85452814031.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/tuluvilefevolofujej.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/81530257025.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/ginubewezarofiritusuno.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/pokemon_blue_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8992/7067/files/man_on_high_heels.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/92267531946.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/94444015639.pdf
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/48133388576.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/lexututurodilemikow.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_off00006d96.bin
fc07da992d1af00bc7facf722ad8d4eb59c3d60fae212f0be5276d38fad9830f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D96 5084 bytes
font_01_sfnt_off00007eca.bin
ad5bae552fdf5429cbbb7521fdd46c18d484389dc21c31add4d00c2350144fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECA 14892 bytes

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