Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fff63830769914…

MALICIOUS

PDF

58.3 KB Created: 2020-08-23 03:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e153762e59636bdcc80a6a48441d7ed5 SHA-1: 6bd8882a49a3ea17daa8700b2a5d11c86c969193 SHA-256: 69fff6383076991472bc624add42b2abdcd10efbe987ac10ebec3a49cdd0f48f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a significant number identified as part of an SEO link farm. One of these links, 'https://ttraff.cc/pify?keyword=alif+lam+mim++full', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be directing users to potentially harmful external 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=alif+lam+mim++full
    • http://files.thecompoundgrs.com/uploads/1/3/1/3/131380008/2da851.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/dynamics_crm_2016_virtual_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/converting_metric_units_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2238/files/mopodupimazofamalutexozuf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/tolosifopowubamirimimu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/49730119916.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/plant_pathology_laboratory_equipments_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/astrology_learning_books_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0564/files/pathfinder_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/bruchrechnung_klasse_6_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/satemulufaroxomebasebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/algebra_structure_and_method_book_1_mcdougal_littell.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/28566870597.pdf
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/wufebonu.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_off0000aa55.bin
c3c7091281ae90f9f1a6c4039b210bd2dacd3a621fc39f70c299f02953606f71
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA55 4628 bytes
font_01_sfnt_off0000ba04.bin
b6ba5d765564e4ceb266902f0d427e448ac79947b73103c1ac80d9f506c43b43
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA04 10192 bytes