Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bba7d00b517a50c…

MALICIOUS

PDF

50.9 KB Created: 2020-08-09 07:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26dd16792b341be9573262e2d044a482 SHA-1: 6ae681c1c0dc1c0334d0b75c9bde49ac0b14a829 SHA-256: 9bba7d00b517a50c56fb143492016d5d7f9d5f3dd4a298d39d5f06b75abe56c5
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Partisans of allah pdf' and the malicious URL, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=partisans+of+allah+pdf
    • http://budumubi.victorialandis.com/uploads/1/3/1/4/131453540/4985104.pdf
    • http://files.mcgiverncarpentryservices.com/uploads/1/3/1/6/131637357/09f11.pdf
    • http://files.schilbersjewelrycastle.com/uploads/1/3/0/7/130776088/4bff4411f41b8e6.pdf
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/detumuvowas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/barefoot_investor_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/46269000462.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/ruxova.pdf
    • https://cdn.shopify.com/s/files/1/0429/4357/8278/files/97776137373.pdf
    • https://cdn.shopify.com/s/files/1/0429/3689/3599/files/7077146966.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/jagexufejanolobo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/goxazupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9475/files/lidimugal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/56382767942.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/52969928486.pdf
    • https://cdn.shopify.com/s/files/1/0434/0714/7166/files/66432424042.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/dewon.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_off0000896f.bin
72b5ef9ed16ce4fac39fcdb64dd33c1df8fcb3592d5dd30cc5c6131239c0822d
pdf-font-stream PDF embedded font (sfnt) at offset 0x896F 5132 bytes
font_01_sfnt_off00009adb.bin
4e2e1b1ac2aa2b32387186e271d846e4a0abd4e4fba049ebe7a5132a8c5c002d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADB 10600 bytes