Malicious PDF — malware analysis report

Static analysis result for SHA-256 716ad0c9b44e98e8…

MALICIOUS

PDF

47.4 KB Created: 2020-08-09 20:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8c46921700bbec3cec96a3df71d4858 SHA-1: 30009b5e977750301944de607ff2d116174a99fd SHA-256: 716ad0c9b44e98e8c84f44a4a188ddae1f541897c9c33bbed55a9b53af14f8c1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for an advance-fee scam, presenting a fake passport application form and linking to numerous external PDFs, some of which are hosted on known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and the document body, though partially corrupted, contains text related to passport applications and URLs.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=passport+application+form+pdf+editable
    • http://files.sheevzphotography.com/uploads/1/3/1/4/131453406/81c93b8e84df634.pdf
    • http://files.scottyppart.com/uploads/1/3/0/7/130740049/39c38bf87.pdf
    • http://piwewi.keithdeininger.com/uploads/1/3/1/0/131070722/5367980.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/25627462887.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/scratching_the_surface_reading_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/29728192625.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/lincoln_arc_welder_225.pdf
    • https://cdn.shopify.com/s/files/1/0428/1935/4791/files/advantages_and_disadvantages_of_shielded_metal_arc_welding.pdf
    • https://cdn.shopify.com/s/files/1/0439/0433/6027/files/ruxosiwatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/65859782240.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/go_away_big_green_monster_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7645/files/jogexebemativunafufevet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0435/1203/7540/files/29506139066.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/fuwoposef.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_off000079cc.bin
66a5e285ed302591dcb638f4eb4dfc814a54e16b544fa8d8e8ce227242eac956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CC 5444 bytes
font_01_sfnt_off00008c31.bin
8647163b79e0aa71c7aeead9853644b0c6f62cdacaf68fd03900e899c0eca4b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C31 10644 bytes

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