Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea408c2a41ef2a9…

MALICIOUS

PDF

56.8 KB Created: 2020-08-29 22:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1905d244ea40a0ab63c43310ad944b29 SHA-1: 9fd5a7a39fa44765f91fc7d57010ba95d7a2a4bb SHA-256: dea408c2a41ef2a96574e2a7cc79010189647c2f39b6eefb6d230b6955073be0
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector. One of the primary links directs to 'ttraff.com', a known malicious redirector. The document body, though heavily obfuscated, contains this URL. The presence of numerous Shopify links suggests an attempt to blend in with legitimate content while masking the malicious intent.

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/wix?keyword=Lage+der+Vorwahl+415
    • https://cdn.shopify.com/s/files/1/0452/2446/0445/files/68088455561.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/aapc_cpma_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/balanced_chemical_equation_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/blade_and_soul_beginner_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0461/6083/8808/files/94267583400.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/26846589648.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/texulukuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/business_administration_text_books.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_0be301ca01c24402bcd094b13fc38bc8.pdf
    • https://static.usrfiles.com/ugd/b8c837_99b0b72cad1e4a6c9c1a156e30f12876.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1493/files/34871642619.pdf
    • https://cdn.shopify.com/s/files/1/0461/0238/0708/files/bulatobud.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/sasizisumib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/tapivizalonu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/70890658715.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_off0000938a.bin
285b95512ac48ee858c04b043615828a2e3220d792e10cb3f95638026057f67e
pdf-font-stream PDF embedded font (sfnt) at offset 0x938A 5264 bytes
font_01_sfnt_off0000a594.bin
4fbd91c8f2aa1f4b3cb0d03fa037a74c46c0ec3541a868923af015dad6b266c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA594 16096 bytes