Malicious PDF — malware analysis report

Static analysis result for SHA-256 2706c009543e8d19…

MALICIOUS

PDF

38.9 KB Created: 2020-08-19 18:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34378cb1734c2426fd471e64c305c3c7 SHA-1: 550c77cba06658ae06c42fd9d72c21df1b56cdd7 SHA-256: 2706c009543e8d19976498b500080a408b7731cd40f6db5836aa40ec5ae9bf5e
152 Risk Score

Malware Insights

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

The PDF document contains a "Supplier evaluation form template" lure, which is a common social engineering tactic. It embeds multiple links, with a critical heuristic firing indicating a redirector to a known malicious URL (ttraff.com). The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily obfuscated but contains the malicious URL, suggesting the primary intent is to redirect users to malicious infrastructure.

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=supplier+evaluation+form+template
    • http://files.stclaircountydems.com/uploads/1/3/2/7/132740405/5147103.pdf
    • http://files.thelovingpath.com/uploads/1/3/0/7/130740586/4841043.pdf
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/8906783765.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/sonuwuroputibuxitepariku.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/36825812708.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/18013089731.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/xolagerebanutopawiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3305/1814/files/40693225151.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68736518606.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/mosoxeverepiwuluv.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/dakuta.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2840/files/shrink_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0789/files/hybridization_of_carbon.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/mafibifenox.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_off00005b07.bin
08ccafcf7cb9a316db11b9ba8f221eb4567dcc50f4e50f7a3c1a98bc56dd9476
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B07 5032 bytes
font_01_sfnt_off00006c15.bin
7d2ddccfe70f68b279d6b06d88cd5ffb2dfdc4a94b0efba043858c1572fec7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C15 10232 bytes