Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0d1dc0e1b58979…

MALICIOUS

PDF

40.4 KB Created: 2020-08-06 03:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc7bb3d6e6067fdc75e9b47c21e55e0 SHA-1: ad03b23b539041ca4cfeb930581b9e6a8be0d580 SHA-256: 0c0d1dc0e1b5897928f765fcbaba971be0b50a8831f5b625e3997080aa4cdb2e
174 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=akuntansi+keuangan+menengah+1+ifrs+pdf'. The document also exhibits characteristics of a callback phishing lure, suggesting an attempt to trick users into calling a fraudulent number. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=akuntansi+keuangan+menengah+1+ifrs+pdf
    • http://files.eomec.org/uploads/1/3/2/6/132681452/5531871.pdf
    • http://files.lucaselliottart.com/uploads/1/3/0/8/130814402/kutubafiguj_pufuwofoxejupo_jawekadowov_zapegerixik.pdf
    • http://files.eifel-wohnmobil.de/uploads/1/3/1/3/131383727/nodolexepazoso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/mivibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/wojenuxijonoriloxulape.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/88501200075.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/warcraft_3_classic.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/sukogajogililabik.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/mepituforigoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4637/files/92931032897.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/2729849727.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/minifusunudikobesered.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/lowdermilk_maternity_nursing.pdf
    • https://cdn.shopify.com/s/files/1/0435/7606/6211/files/2242940373.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8315/files/groin_strain_rehabilitation_protocol.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_off00005c23.bin
a411d8a31b69dfd70432a3ec6e74354e3dc564cdb1035f567f043098de8e750a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 5528 bytes
font_01_sfnt_off00006ed3.bin
5f28230c948fec4e0542b11151e136f2730663381b42f34534f5a4e201c17796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 11100 bytes

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