Malicious PDF — malware analysis report

Static analysis result for SHA-256 306f8650d7fb1ffa…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 23:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2122b4aa8bffd8194f19080098c71ad9 SHA-1: 03090c7955582e1d38c503a5ef129f7af95ad13d SHA-256: 306f8650d7fb1ffa9c0e9444ee7637de964325fea7c9249002190d0820290d85
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The primary intent appears to be directing the user to a malicious site via the embedded link, likely for phishing or malware delivery.

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/pify?keyword=extended+essay+guide+economics
    • http://xitexoriw.mantorvillain.com/uploads/1/3/2/6/132681556/lilaxumikoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/83913379219.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/duped.pdf
    • https://cdn.shopify.com/s/files/1/0437/9063/1064/files/zedinusanevapunotij.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1628/files/31458798973.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/72184543948.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/72620686488.pdf
    • https://cdn.shopify.com/s/files/1/0437/0310/7752/files/arrhenius_equation_chemical_kinetics.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/vosokeroxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/46834884472.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/40121692700.pdf
    • https://cdn.shopify.com/s/files/1/0445/7860/3172/files/6_below_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/juromusiwutivasuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/19357015718.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_off000070b1.bin
360c39d2a6c0d8a46b41053d5dd307499dca0c7620dbbc2c45c23287cefa8258
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B1 5260 bytes
font_01_sfnt_off00008290.bin
133df9fcf4903ba5bfe50de6a2b1d4ebb6d652283806bb4e2117559166960842
pdf-font-stream PDF embedded font (sfnt) at offset 0x8290 10260 bytes