Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b126fd4c15d1f0d…

MALICIOUS

PDF

54.8 KB Created: 2020-08-07 15:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 814e9c27cb45762b6d4e25f930339431 SHA-1: 6c45369a38a49e3fd39d474c454509cd9f628438 SHA-256: 5b126fd4c15d1f0d3056cc863ad2691bdf2c7189400a122e81c09b1b090c8d2c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious due to its inclusion of a large number of external links, many of which point to a known malicious redirector. The document body, though obfuscated, contains a URL that leads to this redirector, suggesting an attempt to direct users to harmful content. The presence of numerous links, including those to Shopify, indicates a link farm or SEO manipulation tactic to distribute 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/pify?keyword=guru+graha+mantra+in+telugu+pdf
    • http://files.serenityreikiclinic.com/uploads/1/3/0/7/130775712/netigodesene.pdf
    • http://files.calhanorteportal.com/uploads/1/3/1/4/131453871/woxekeribavasoweju.pdf
    • http://bugebuzo.sidthesasquatch.com/uploads/1/3/1/6/131636725/056c07f995.pdf
    • http://kizaloson.bluebonsaiprinting.com/uploads/1/3/1/4/131437462/waliwireto-nigomowuka-mukogizasomekil-felalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/kptcl_junior_assistant_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4642/files/xedanolinirolaxugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/bacteriophage_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/losulelivitasot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/pabefepawotawumatuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/nenobetikakubosobaguw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/daily_adhkar_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/9706/2564/files/57711546128.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/38197771149.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/66204340156.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/bujifidokenin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/vovozekexarimi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/liwenimegakawajuxamokaget.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4577/files/18370505462.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a5.bin
a3551e8694c9cdb6d40fbb2ff5ba0a8442798f253aec289c43e5a702ecb66878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 5308 bytes
font_01_sfnt_off00007a8a.bin
a7c7d54065a41e8b1da31188e3cfda888df2afad74001b4bac93364cda2784fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8A 10384 bytes
font_02_sfnt_off000096e2.bin
b67a19b1cdee9c06f76abeb03c86a1860bf25dbf42c087ef0eaff8b864b602c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E2 9808 bytes
font_03_sfnt_off0000b8c0.bin
27737eda48815fa79dc2e10a8e61a6b5fc808b1627b6d22ef761577000bc19aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C0 5744 bytes

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