Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bc038a0342691c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 15:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d30fd6f4ed4e3fbcfff815dbb17a4f75 SHA-1: 23e73c83f2c29910f462ee0221312ec708ebf512 SHA-256: 47bc038a0342691cee7912a057d3a09939cc5a3a1b30d18ff7475e4c1a9b08a2
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body text, though heavily obfuscated, contains the same keyword as the redirector URL, suggesting a lure. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt to distribute 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.cc/pify?keyword=congenital+neurological+disorders+pdf
    • http://fadago.soeasyofficial.com/uploads/1/3/1/0/131070450/wisufe.pdf
    • http://files.mysteriousmisterenter.com/uploads/1/3/1/4/131437513/b748e91e3dc40b.pdf
    • http://files.shopdsr.com/uploads/1/3/2/3/132303373/duxugiton.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/34304648202.pdf
    • https://cdn.shopify.com/s/files/1/0435/4958/9668/files/nidamukodukerebuvitowavop.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/jidinutomod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/48117382727.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/minotoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/psychology_vocabulary_in_use_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/psd_to_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/26122466724.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_off000065d4.bin
8379ae4af8b6ad27af23f5a869e72a9191d383f8b80503e037ca93c034fc0696
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D4 5228 bytes
font_01_sfnt_off000077a8.bin
87851fcf1dde873e75755d115a6319e8308e0c5af6b177e7de634669e592ef79
pdf-font-stream PDF embedded font (sfnt) at offset 0x77A8 10076 bytes