Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f14b2cf20d3c05…

MALICIOUS

PDF

37.8 KB Created: 2020-07-30 03:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8b618d7dc1e3d0b08b8f87047d2d224 SHA-1: 94876150a0747dd4dad96891ffd43bc9d8dd2dc8 SHA-256: 00f14b2cf20d3c05e28e73caa754fa74caf43e597f9f677771485211f9976313
154 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a large number of external PDF links, suggesting an SEO link farm or phishing attempt. The document body contains garbled text, but the presence of URLs and the heuristic firings strongly suggest a malicious intent to redirect users to harmful 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/pify?keyword=bescherelle+college+pdf+gratuit
    • http://files.isabelleclayart.com/uploads/1/3/2/6/132682882/nulirisogupe.pdf
    • http://files.lakecitychamber.com/uploads/1/3/2/6/132681690/gujegedib.pdf
    • http://files.gandtsales.com/uploads/1/3/0/7/130739719/4139354.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/68723343845.pdf
    • https://cdn.shopify.com/s/files/1/0428/3206/8775/files/govonufivetodepi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/26729520900.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/80998577356.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/14734447151.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/10243619893.pdf
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/88168308452.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/51109962722.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/wikabetikafusove.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/92261619017.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3199/files/liletegokutabigokuduru.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_off00005564.bin
3619dca706708af6f58e215b22906a2bb8dcc04120985dfdd860d3063b256f79
pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 5244 bytes
font_01_sfnt_off0000674c.bin
564b0817612ae3d040add7a2a3868d8534a904bd147f3b6a72b63229283e38d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x674C 10292 bytes