Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7df01b9988f3a…

MALICIOUS

PDF

49.0 KB Created: 2020-08-09 18:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 486ed918716f5c6206b6fa95709d8546 SHA-1: c16d4896d78a034511350d1a3169dcb0ec3c05aa SHA-256: 02a7df01b9988f3a07127caccb2b016ba6e90021a1eda5bdba727b26bf51757f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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.com/pify?keyword=full+list+of+calisthenics+exercises+pdf
    • http://begotuva.bnorthphotography.com/uploads/1/3/1/6/131606289/8d752f7d.pdf
    • http://files.kcbcstore.com/uploads/1/3/1/3/131398542/xomez_vivenuwigo_meritup_lafuwi.pdf
    • http://files.sherpapackers.com/uploads/1/3/2/7/132741029/kusovuvesuzimev_sinodapuv_tuvazari.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/22702739207.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/estadistica_descriptiva_e_inferencial_libro.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/voriwazikevamapaziru.pdf
    • https://cdn.shopify.com/s/files/1/0431/5165/5061/files/black_boy_richard_wright_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4846/files/relekaleg.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0690/files/5960235715.pdf
    • https://cdn.shopify.com/s/files/1/0440/4684/4054/files/scanned_to_word_i_love.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/besagekupejeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/muxudalexed.pdf
    • https://cdn.shopify.com/s/files/1/0433/2653/7883/files/zatavofamiritejuvoxix.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_off000082a2.bin
f4bfd5fd5689a069eef5d0fe551f7ee2feda37ab64e6a11bf422149d93f8f8b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A2 5268 bytes
font_01_sfnt_off00009491.bin
a1d2f4924a14f9ffc60341ee0803808bd54612db0ef86fc124a693e3913df693
pdf-font-stream PDF embedded font (sfnt) at offset 0x9491 10120 bytes