Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a18989d2eb0def…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 11:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8fd1329f6bdb7655d7fc6a70c9877bd SHA-1: e92caae99ccb83e56df900f8f9bd0c3ac996fc51 SHA-256: 10a18989d2eb0defde895e1a811f8ea00d07e7c30fbac1c84ef05d8eff3acdb4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one prominent URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to game locations and the redirector URL, suggesting a lure for phishing or a scam. The presence of numerous external PDF links, many of which are benign, indicates a link farm strategy, potentially to obscure the malicious redirector.

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/wix?keyword=the+division+boss+locations
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_bba919c11bb14f9694b66fad55a6b759.pdf
    • https://static.usrfiles.com/ugd/ad2ade_c1cf72e43de740c194709ec5806d36d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_733be6816e294ab59cf03ba9757d797e.pdf
    • https://static.usrfiles.com/ugd/286fb8_2488b7da22c8432ea5093cb3833fbc91.pdf
    • https://cdn.shopify.com/s/files/1/0429/3938/3971/files/photography_copyright_release.pdf
    • https://cdn.shopify.com/s/files/1/0464/8776/5160/files/desh_bhakti_geet_full_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0435/2753/6799/files/70109946530.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/zewewenebe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/lufurerib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/calculer_vitesse_moyenne_avec_deux_vitesses.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b723ca448249d7b193bc810be51e90.pdf
    • https://static.usrfiles.com/ugd/d54300_b9f6cb088811416aaf7fc71ac47dda8f.pdf
    • https://static.usrfiles.com/ugd/34ec99_c2825b04583f44b9b16555d130741404.pdf
    • https://static.usrfiles.com/ugd/a59130_f354427dd49f4aa9bc5119a9f57f8bd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbbfd0603f3e4887bbdb92b5c4ab1d31.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_off00006c45.bin
c293a404fc6c3c13282782aa525d2dffb728b8c3250e2308260ad8ff2d7b9fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 5080 bytes
font_01_sfnt_off00007d86.bin
2a91d3ff0e81a73d7a03163923bf42cf8ac14ff5be963452d521916d0e4b3587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 10296 bytes

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