Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e226a4088647744…

MALICIOUS

PDF

64.6 KB Created: 2020-08-07 07:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76bfc780e05eac5361984d61e979b1d7 SHA-1: 6a34b38c2251763bf97e93a699108ac05f75d960 SHA-256: 0e226a408864774466f420390a326499fbb2f95ac01c9b2e472679e7c9af059c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lead users to harmful websites, likely for phishing or malware distribution.

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/wb?keyword=dispositional%20resilience%20scale-15%20pdf
    • http://files.ascendia-sports.com/uploads/1/3/1/0/131070160/xabupedizir.pdf
    • http://files.virtualhealthcareportal.com/uploads/1/3/0/7/130776795/278b5d23f.pdf
    • http://files.heartburstman.com/uploads/1/3/2/8/132814593/gadexobidivade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4423/9517/files/19081352794.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/79743117294.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/31047558798.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2843/files/50090131317.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/17631054402.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/winubazizov.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/jipazivese.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/18782375188.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/arriva_trains_wales_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/1944708919.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/sybex_cissp_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/bopumajadexut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5647/1970/files/zotarapetodapuvuxat.pdf
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/chamberlain_liftmaster_professional_formula_1_manual.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_off0000bd0e.bin
1f2e33417e2072bf5641d9111ba6521ec2942e79ed90e535d401008e8655ca38
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD0E 5356 bytes
font_01_sfnt_off0000cf68.bin
8b89f70bc4429351ff9245ca9cf686571665432bcb13c40df6a74e1456ff8ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF68 11140 bytes