Malicious PDF — malware analysis report

Static analysis result for SHA-256 111ac395c1c0c58a…

MALICIOUS

PDF

54.3 KB Created: 2020-08-25 06:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2daaeac63a1c98f717af4822acbdaa6 SHA-1: 73dccecff1f042e59ec37891b94624ce7a5e7454 SHA-256: 111ac395c1c0c58abb3d57984c6fb5dc4b0988caffe0e56979d4ff8426e613a7
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL that redirects to malicious infrastructure, likely as part of a phishing or scam campaign. The document body, though heavily obfuscated, contains the same redirector URL and references to a movie, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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=dashing+cm+bharat+full+movie
    • http://files.fawkhamridingclub.com/uploads/1/3/0/7/130776245/nodixuto-pudiwanasexa.pdf
    • http://files.epiphanythunderbay.com/uploads/1/3/0/9/130969623/zekepujuju.pdf
    • http://kuzeb.bolingbroke-writers.org/uploads/1/3/1/4/131437044/wutupexevanu-befufa-kuwal.pdf
    • http://xotob.taylorsvillehamnet.org/uploads/1/3/1/6/131606457/noxiloxutov.pdf
    • http://megag.joerichsociety.com/uploads/1/3/0/8/130814328/kinuxafudapepet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/subuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/7308019501.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/industry_report_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/doki_doki_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/zuxovujonubaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/mp4_vs_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/17537258808.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/settlement_agreement_cover_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/sopep.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/94020996135.pdf
    • https://cdn.shopify.com/s/files/1/0439/5175/1336/files/graduation_thank_you_card_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/7156/8040/files/lufunapinutetubifuzu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/6588384294.pdf
    • https://cdn.shopify.com/s/files/1/0465/4759/9518/files/fenojukunojepelegosid.pdf
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/thnks_fr_th_mmrs_chords.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081b4.bin
7842af4a70510566d031ef8c52301dc19721f29084223c1c95b1c76eea9005ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 5492 bytes
font_01_sfnt_off0000943a.bin
3f4b1956c21b681d86096e2efc936416cd727d18c664e86a84dcac62cd624679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943A 9980 bytes
font_02_sfnt_off0000b6a2.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A2 16164 bytes

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