Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ea38b06117e869…

MALICIOUS

PDF

113.3 KB Created: 2020-08-01 08:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc180618203aa3dba30d45fa6e2918fc SHA-1: 805f970480a8330f5d9cd7946977f02267b9161e SHA-256: 49ea38b06117e869a928f354e459e52b7805cc743626df4e1eff5f57e7c22f8d
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=crimes+of+the+heart+beth+henley+pdf'. Another critical heuristic indicated the presence of a link farm, with many links pointing to Shopify domains, likely to obscure the malicious intent. The document body, though heavily obfuscated, contains the same malicious URL, suggesting it is the primary lure.

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=crimes+of+the+heart+beth+henley+pdf
    • http://files.btaccountingandtax.com/uploads/1/3/1/4/131437670/8a32a3c.pdf
    • http://files.kriswiltse.com/uploads/1/3/1/1/131163787/gidodovem.pdf
    • http://files.megantracyphoto.com/uploads/1/3/0/8/130874038/kebotovasenoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/26544100035.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/likoxide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zovoxumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6774/4160/files/gupaburowafotagiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/besorotorulubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/fuxib.pdf
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/pusezagifebuwaxifun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/fawasakatitum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0436/2423/5170/files/25901171049.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/selurirugubapuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/visualizing_human_biology.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/85856606072.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/71940852124.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_off000181ab.bin
f615a8850d2d1fc6b2bc2779bd5ce92e32e411b779cdf9d259651c484b3941d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x181AB 5428 bytes
font_01_sfnt_off000193ef.bin
8e4d34430bd472d065f7c1061f0592f6fd3811f73e9885a3da6d761f708dc125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193EF 10420 bytes

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