Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd1d559dec64397…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 18:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6ae621f354b4e3cd4e41f2f109cef4e SHA-1: d3d893f8eba6ccce23694fe0b24e6549282fbfaf SHA-256: 0dd1d559dec64397caafbe232d49c6901f0f79f36a0055c82d94a291b5b78eda
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on Shopify, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the string 'Harga avanza 2010 manual' and the malicious URL, suggesting a lure to trick users into downloading or accessing potentially harmful 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=harga+avanza+2010+manual
    • http://files.faceteight.com/uploads/1/3/1/3/131380641/099d8f799fc3c42.pdf
    • http://dugoxi.accentbottlelights.com/uploads/1/3/2/3/132303195/zelozave-zatubibavolol.pdf
    • http://kirofimek.eldeststudio.com/uploads/1/3/0/8/130874284/wafal-zanusexozib-newifoxux.pdf
    • http://kufajo.rosekyungwonkim.com/uploads/1/3/1/4/131453060/vaxedi_xuragetovog.pdf
    • http://nagil.gccraftsanddesigns.com/uploads/1/3/2/8/132814337/xerolamamusozez-metoxelebunaju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3703/8494/files/33182343525.pdf
    • https://cdn.shopify.com/s/files/1/0440/8334/7606/files/afghanistan_calendar_1397.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/83647574440.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/japanese_slot_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/wapup.pdf
    • https://cdn.shopify.com/s/files/1/0450/3791/2214/files/vizibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86187089948.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/lagani.pdf
    • https://cdn.shopify.com/s/files/1/0431/8478/3509/files/92757647844.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/nom_concret_et_abstrait_exercices.pdf
    • https://cdn.shopify.com/s/files/1/0433/7231/4789/files/fusionner_deux_fichier_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9703/files/spread_spectrum_modulation_in_digital_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/9730/0899/files/rofebivazug.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_off0000681f.bin
35c39858571825e2203523f5cf71a1a697849ad16984be4c249f774136cdc92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681F 5224 bytes
font_01_sfnt_off000079dc.bin
4782ab99e5f8858e4f083d9309de15c2c11474ac0160a6761fa49bebdf328c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DC 10016 bytes

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