Malicious PDF — malware analysis report

Static analysis result for SHA-256 487388cb3a6cb387…

MALICIOUS

PDF

41.0 KB Created: 2020-10-29 00:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2380038ca4bd705a2baec7c07645cb0 SHA-1: be938c00a9e1fa58ec2aa0dbd5be849a8da26e87 SHA-256: 487388cb3a6cb387c3dfe67087804409b41cf8bb347ccbb8203c3119f48a282b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to redirectors or potentially malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though partially obfuscated, contains a URL that is also present in the list of embedded links, suggesting a deliberate attempt to direct users to external resources. 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://gettraff.ru/aws?keyword=magnilife+relaxing+leg+and+back+pain+relief+cream
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f875a1331d70.pdf
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/kefikon.pdf
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/adecc35c5.pdf
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/jovukikunilenesorami.pdf
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/ratud.pdf
    • https://rizidapovo.weebly.com/uploads/1/3/4/3/134316848/3cf46a6cdcb.pdf
    • https://paripipedaninez.weebly.com/uploads/1/3/4/4/134444050/wudexev.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f91640a522e8.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f887b8cb7eea.pdf
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/4a860014.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5153/9866/files/live_bacteria_in_cosmetics.pdf
    • https://uploads.strikinglycdn.com/files/b9e349c1-a3ab-4aef-a266-709a13816e9e/9131221443.pdf
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/davegumeraja.pdf
    • https://cdn.shopify.com/s/files/1/0464/6276/3160/files/fewopajalozajujudo.pdf
    • https://uploads.strikinglycdn.com/files/8e05ef09-74c6-41b0-8854-2f1780041563/76573505585.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_off0000632e.bin
8fefe98a995730f14b4e97ed87bfd5c2b8eee1d2522a45e0cedff432dfce540c
pdf-font-stream PDF embedded font (sfnt) at offset 0x632E 5576 bytes
font_01_sfnt_off0000762d.bin
d24a7f299428c3f5c4edff34b57adb3370bcfb1e79edc4cecf94a18527ae947f
pdf-font-stream PDF embedded font (sfnt) at offset 0x762D 9568 bytes