Malicious PDF — malware analysis report

Static analysis result for SHA-256 590efe1faf036be4…

MALICIOUS

PDF

38.0 KB Created: 2020-08-19 18:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b9611de75c78c4fdcbaf7cc96cfe531 SHA-1: 8c0de4e4d379ea1b3addc1b336b02323a0f378b5 SHA-256: 590efe1faf036be4d4a8efb1be3c2571f66a2d5de6c18fd84f3b93164669f9d0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a mention of 'Fuji xerox driver', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further payloads. The primary malicious IOC is the redirector URL.

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=fuji+xerox+driver
    • http://relajedal.dianamdurand.com/uploads/1/3/0/7/130739289/5313165.pdf
    • http://files.newspringscommunity.org/uploads/1/3/1/4/131453329/3351242.pdf
    • http://files.hugobenedetti.com/uploads/1/3/0/7/130738562/todorugowisinexug.pdf
    • http://files.rvlifefromtoptobottom.com/uploads/1/3/2/3/132302847/3e9ee34c4c4889e.pdf
    • http://mijopeb.kempnermethodist.org/uploads/1/3/1/6/131606183/214dc845.pdf
    • https://cdn.shopify.com/s/files/1/0434/6626/0642/files/50623024640.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3205/files/appreciation_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/xudojuvisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/zazojupapepoxoribalisi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/physics_textbook_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/takojepuzepoxarusukeri.pdf
    • https://cdn.shopify.com/s/files/1/0436/1627/2547/files/information_literacy_definition_government.pdf
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/clicker_heroes_idle_build_2017.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/gdpr_article_15_response_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/30466740580.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/just_already_yet_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/photoshop_cs6_mac_crack.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_off0000590a.bin
3fe7780e89aa8ffb96c85109f5efcdb74b317de5357a91b77f7aa5bc56aa02d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590A 4556 bytes
font_01_sfnt_off000068a6.bin
f8ab64009c9b2996350e3507543cdab4887d5d5aba6016190da8403c675c9ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A6 10112 bytes

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