Malicious PDF — malware analysis report

Static analysis result for SHA-256 6907ec6ca2f7fe1d…

MALICIOUS

PDF

55.1 KB Created: 2020-08-30 21:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 213f63bfea0b7a834f7b85fd47c1292d SHA-1: caa6234594c7fe2c269c41c22b12d6912bacd385 SHA-256: 6907ec6ca2f7fe1d39d6df84bed6c762c47784f2474977b30d8c648f9e97d41e
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is likely used to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise its malicious nature. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=ingilizce+%2525C3%2525B6%2525C4%25259Fren+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_133d4397d13245c8aac7a98d672075fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_508c25ef685e46debc058e6f0103545b.pdf
    • https://static.usrfiles.com/ugd/6846fe_1ffb0571a4884088ac8d70a678960e01.pdf
    • https://static.usrfiles.com/ugd/d94ae5_3b2845eb0399459289161ac99192ff0a.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/sogefufape.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/bee_swarm_simulator_beginner_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/amount_to_cover_mmc_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/gesulomexarivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/60471231191.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/3ds_max_2020_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/pmmc_ammeter_and_voltmeter.pdf
    • https://cdn.shopify.com/s/files/1/0434/6245/9544/files/jozoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/jebezimazafejulufimadozi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009044.bin
f7865abb31e5d4ba4171567a872e0c6a6f351a6e4fa5fc017f5f861057f900b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9044 5292 bytes
font_01_sfnt_off0000a199.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xA199 1800 bytes
font_02_sfnt_off0000aa29.bin
34c49f6767629dbddd455aabfed91f082b275d82c0f972c809674d2c8e4f796c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA29 10888 bytes