Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9f4fbc5ee34fea…

MALICIOUS

PDF

41.4 KB Created: 2020-08-26 22:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ceb224228d2ac4e8730fc70dffff32f SHA-1: 4846311af96b254fda214d2f877894814460c843 SHA-256: 6c9f4fbc5ee34fea4964b97ebc56813f94780967b1fa4911c999c22c6dc54ce6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a product and the malicious URL, suggesting a lure to a phishing or scam page. The presence of a link farm further indicates malicious intent 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=jack+lalanne+power+juicer+express+parts
    • http://files.oceanwisejourneys.com/uploads/1/3/1/4/131437603/08903167649053c.pdf
    • http://files.framemysore.org/uploads/1/3/1/3/131384789/7349004.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/32809677631.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/wiwajifaginivelexasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/15161828052.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/6344123781.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/fuzidizorafeliju.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/jipavigodikimosozezilaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9707/1524/files/43702157374.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/nufagumugevubedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3924/files/zadefi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5162/files/abbyy_transformer_2._0_serial.pdf
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/mefokinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/68739626815.pdf
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/tijumeniga.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_off0000634c.bin
b655ebfb0cb5b8b5962eb75805e1b9d28157d9bc110f7ea0bbfcb280317b5127
pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 5216 bytes
font_01_sfnt_off0000752f.bin
a77e0c951279210515bcb70587faf06fc9cfe399f6b1f6163f5cec330d8e425d
pdf-font-stream PDF embedded font (sfnt) at offset 0x752F 10504 bytes