Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e55e378964d534…

MALICIOUS

PDF

42.3 KB Created: 2020-08-02 01:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd44b2ba84d94da588d8c116c33f73cb SHA-1: fb7dde1dd00533c036ef38644f3211a6b0fdcec2 SHA-256: 14e55e378964d534d9562f88bbf90ea7f3609fb19f1ad9ddeba0e6997dde5b51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a product listing, suggesting a lure to trick users into clicking. The presence of numerous links and the ML classifier's high confidence indicate a malicious intent, likely for phishing or malware distribution.

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=new+venture+gear+3500+transmission
    • http://files.drewbcarr.com/uploads/1/3/2/7/132741211/gevufitetogevu.pdf
    • http://files.areyouinpartnership.com/uploads/1/3/1/4/131437806/4099252.pdf
    • http://files.singplayaudiate.com/uploads/1/3/1/6/131637254/97fccf9c2.pdf
    • http://files.sunrisechiropracticcenter.net/uploads/1/3/1/4/131453574/6273303.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/33674876022.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/jatagikuderebolubezixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/bavufaperapetixaru.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5886/files/54159908655.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/narezobaganowupuzige.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/kubibexol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/zumozirakebibedapimefer.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/zurareronujosomibul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/36257217761.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/70149646200.pdf
    • https://cdn.shopify.com/s/files/1/0434/2854/4668/files/ketutejodowidetijigoxan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1809/9615/files/79607507724.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_off000065d8.bin
3f73404298879f58e6b132df96164e9696d7cf69453badbbcdaafb2e8dace7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D8 5524 bytes
font_01_sfnt_off000078af.bin
e98c09e7d2ad317f46e55d1dde770bb042cbfcf4e650ef6792e2cb92650d8bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 10436 bytes

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