Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e10bd2c354efdf…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 03:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32471e6db12d6e7c66c3b12440a928cd SHA-1: 32d2892e5f2c15b5210df15fb9772d871cd3f7ba SHA-256: 80e10bd2c354efdf2a1699b3f18411ad7050c38bc9d3ac45c771d780ad836661
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to lure users to malicious 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/wix?keyword=daniel+caesar+case+study+01+download
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/the_dictators_handbook_criticism.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5149/files/bhagavad_gita_livro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/85975446764.pdf
    • https://cdn.shopify.com/s/files/1/0434/7651/7014/files/56759434916.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/lepaxavufojamisusabuwavo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/xavemabixifine.pdf
    • https://cdn.shopify.com/s/files/1/0461/8105/6675/files/avatar_aang_wallpapers.pdf
    • https://static.usrfiles.com/ugd/48d9a1_214549fb738b429db293b70c23b64f4f.pdf
    • https://static.usrfiles.com/ugd/9c43ec_b2c67f6d1c4e4c948d47847ffd415cee.pdf
    • https://static.usrfiles.com/ugd/e745be_afcfb74b971d45d1ad0f8ca2f110ea11.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_1f0f9fa5cdf4468a88ce6f12276f40f0.pdf
    • https://static.usrfiles.com/ugd/39cb9d_11f78688136744588ed4bbc5d74ca084.pdf
    • https://static.usrfiles.com/ugd/b8c837_1184f9f3fe86435aa291defcad351a0d.pdf
    • https://static.usrfiles.com/ugd/3e5d97_7eb8bc3385c6434986ae29e9aebc2983.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7ef624ea4c24ec9b07957656968102d.pdf
    • https://static.usrfiles.com/ugd/136d07_0fdb8fbb2e8b4db7a479407bce1b66c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aa831ffa1ee41eca5ec82483d40b280.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005242.bin
dd82400939e0c4217ab01b6e6736087aecf025aaf27ac8676df76c25d81e29f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5242 5320 bytes
font_01_sfnt_off0000647d.bin
7322d68200d33b09036b8556fa4b2a0daf2614ea984e0bfd81e2cc796367d84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 10904 bytes
font_02_sfnt_off000088b6.bin
5bd88bd5c44eb894b151ed33ba27cda91e6b534aa93a3b288c9f525c64baf622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B6 16060 bytes

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