Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac020b7068ffef68…

MALICIOUS

PDF

52.7 KB Created: 2020-08-12 22:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e685552a1aceffeb847d66d26c14bd9e SHA-1: 87e9f7740a0c326c557102498e9fb11d1a78a921 SHA-256: ac020b7068ffef68d99ebc31447ae119e338172de6be1d23e463aa2061595e04
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a free download for 'Beekeeping for dummies 4th edition pdf'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=beekeeping+for+dummies+4th+edition+pdf+free+download. The document also hosts a large number of external PDF links, many of which point to benign Shopify domains, suggesting a link farm or SEO manipulation tactic to improve search ranking for the malicious content. The ML classifier strongly indicated maliciousness.

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=beekeeping+for+dummies+4th+edition+pdf+free+download
    • http://files.liftinggearhampshire.com/uploads/1/3/0/7/130775529/degunaxum_pubob_galenefipakaj.pdf
    • http://files.thepinkhairbox.com/uploads/1/3/0/8/130813511/2032074.pdf
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131455883/jalupi.pdf
    • http://files.advancedanaerobics.com/uploads/1/3/1/3/131378899/1721378.pdf
    • http://ginovere.lindsayhancockpetsupplies.com.au/uploads/1/3/1/4/131409090/duxodemufu-sodidopubisarek-muxitukiwo.pdf
    • http://ginovere.lindsayhancockpetsupplies.com.au/uploads/1/3/1/4/131409090/duxodemufu-sod
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/wujajabu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/remimerusezusasurufoxile.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7579/files/47604344073.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9628/files/guide_me_o_thou_great_jehovah_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/38490354676.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/69721133636.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/14471085213.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/foundations_of_analog_and_digital_electronic_circuits_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/jijefugut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/clickfunnels_image_full_width.pdf
    • https://cdn.shopify.com/s/files/1/0440/8472/3864/files/gijatebob.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e5f.bin
5a356ee59e8762d913d3ff90acf82b25a48aafde67976ac3ea358022dce68560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5F 5748 bytes
font_01_sfnt_off0000a1e4.bin
f4cd96d7341d6bac06708664ceaa301ebba93c255dc0de361ff3d571c575038e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E4 10288 bytes

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