Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d63949552032011…

MALICIOUS

PDF

37.2 KB Created: 2020-08-24 18:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ed9c37c4edb387dae358b522e1a023 SHA-1: 4815559e84752a92eeb02ff0aa6015abe0e9ddd1 SHA-256: 9d63949552032011a2904f3940f058ab5f74dd3488494a6f675e113343881095
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to benign content, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that the embedded links are intended to lead users to harmful sites.

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=leinster+house+guided+tours
    • http://files.topsaharatours.com/uploads/1/3/0/7/130738830/zuxanironinodulosa.pdf
    • http://files.heartlandpools.com/uploads/1/3/1/4/131454808/53e56f9e6db.pdf
    • http://zekikeme.millsupportzuid.com/uploads/1/3/1/1/131164250/wavevenupudogo_fuzapagepe.pdf
    • http://files.foxtapestrydesign.com/uploads/1/3/0/7/130738792/niwozep_nuwuw.pdf
    • http://files.ofp.cosmo-ufes.org/uploads/1/3/1/8/131856992/tugigajimeg_pelezalufexe_datigojixifure_xitefob.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3302/files/besame_mucho_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/funeral_prayer_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/13945086613.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/obituary_writing.pdf
    • https://cdn.shopify.com/s/files/1/0437/8807/5159/files/abbyy_finereader_12_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/isotropic_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0457/6808/1574/files/feature_article_template_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/69234640294.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/alucobond_cladding_details.pdf
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/78726603529.pdf
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/orange_color_hex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0462/3033/9735/files/delete_browsing_history_in_google_chrome_android.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_off000055b1.bin
82b3989625bc18114e0f7905075f68f1fb5334813ea0c746256d9d5705aae288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B1 4784 bytes
font_01_sfnt_off000065f0.bin
70bb8c11c92b7b05b1069027c7c26c1f4a91cc85c2dd5b484b10b6453eb26f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F0 9920 bytes

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