Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecfd12f99c1b905…

MALICIOUS

PDF

35.3 KB Created: 2020-08-31 20:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34408e63c5aa048668ea21cb06e2091e SHA-1: fcb8da9c26f1b60e22b40b086e7d5978a4219a6c SHA-256: 7ecfd12f99c1b905c551c4a19a2eb2145e8881654cde0d30bdd27506bb8b78cc
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, but one critical redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a financial report. No scripts were extracted, but the presence of embedded URLs and the redirector strongly suggests a phishing or redirection attempt.

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=financial+report+air+new+zealand
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/child_support_guidelines_in_louisiana.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/pedunezuzelavinosove.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/xifatisidox.pdf
    • https://cdn.shopify.com/s/files/1/0461/9898/0757/files/sezetavogu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/phenomenological_research_approach_d.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3396/files/32904120388.pdf
    • https://cdn.shopify.com/s/files/1/0437/6241/7825/files/feral_dps_guide_bfa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6566/1853/files/pandoc_markdown_to_slides.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8830/files/zurawajifuwuki.pdf
    • https://cdn.shopify.com/s/files/1/0435/0892/4568/files/dibetologu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/sotebewizesijowomikut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/atulya_bharat_book_in_gujarati.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_off00004cdd.bin
c37c19df3ebd9896e22eded785af3b218338d4f158326ecec001705737bcbdd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDD 4988 bytes
font_01_sfnt_off00005dfc.bin
a8fc44f53d675aad10430a55aff16d43772b12a7e1fde1710fa9fea61c6ebc16
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 10236 bytes