Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4feb256447dfba…

MALICIOUS

PDF

59.3 KB Created: 2020-08-12 16:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6dcdd7be94eecf2de0ffc2259f30810 SHA-1: aceee27b484ba0e19108502cfef78b33e8f2ddbb SHA-256: 5f4feb256447dfba66d47ff0c07dfcf722e7a7af4c977b37f016177988b0be84
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=5th+wave+book+pdf'. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly indicate a phishing or redirection attack.

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=5th+wave+book+pdf
    • http://files.manateeconcertband.org/uploads/1/3/0/7/130739693/nemifoxekilule.pdf
    • http://maxebunuv.energyhealingforallages.com/uploads/1/3/0/8/130874422/3108222.pdf
    • http://files.themsteaparty.com/uploads/1/3/1/4/131437859/7006320.pdf
    • http://files.reimak.com/uploads/1/3/0/7/130776060/ravisugamoro-javal-tijotujagala-tojepazisilugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/84781740424.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/42263032729.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/84347274570.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/ceclor_bula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/digital_cinematography_david_stump_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/wefuvejaruzumuzex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73930450062.pdf
    • https://cdn.shopify.com/s/files/1/0448/4271/3250/files/adding_and_subtracting_decimals_word_problems_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1513/files/integration_area_under_curve.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/zugulujeguz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/tiruranakiputaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/donulasi.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_off0000ab8b.bin
0002d1e786f68cb6ba7e542ded6bcf9ec7e1f4a1a471abf4ec6381bc2d5d052e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8B 5208 bytes
font_01_sfnt_off0000bd59.bin
3b299f9856bd7b5bf42b9d99e1bd9404fb81e761a2774405b1781de9fb43a3a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD59 10304 bytes

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