Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a605f345e024d9e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 00:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7c33a931ceb5c4b791029d001f989f1 SHA-1: 8b2b27a0dd1c1f1b067efa184035b368463ca7ec SHA-256: 9a605f345e024d9e120e801ed925ae1ada97635ae16df84ccdd2f481ed95fee9
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'File police report online san francisco ca', suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to shopify domains, likely to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=file+police+report+online+san+francisco+ca
    • http://pavabi.sub-culture.store/uploads/1/3/0/8/130874493/pivuwutaloxi.pdf
    • http://files.justforyouspa.com/uploads/1/3/0/7/130740323/e5ea9d460d.pdf
    • http://files.pacificislandaqua.com/uploads/1/3/1/3/131379054/bb3aca0.pdf
    • http://files.bemedialiterate.com/uploads/1/3/1/6/131607043/2371147.pdf
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/boy_scout_uniform_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/pigovudufaledetizosow.pdf
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/feveperamemobadikodite.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegegezanonipilupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/47442214495.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/29865154997.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/les_accords_d_evian_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/gejokojegezagipufuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/50159909793.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/kerberos_authentication_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6095/3249/files/60582370992.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/94228939163.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/24762996451.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/71323434755.pdf
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/ru_admission_circular_2020_20_download.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_off00006887.bin
b9c85dc226e07e59d1c3cbfc0075d974af8eeb16d015f52322afb542d41eb3f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 4964 bytes
font_01_sfnt_off00007975.bin
cf7c7d98c65902019e556de8cf2790b2536375614fb0283bb275bb526f052740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7975 10352 bytes

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