Malicious PDF — malware analysis report

Static analysis result for SHA-256 a427768caa99771e…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 17:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce0fd3aa204916de4f3effcf43d7d77c SHA-1: ff1d11569b9f6182103b1dadb03784ce22435a93 SHA-256: a427768caa99771ee5cd4e5c7e2a779c4af7e92429c3d049854efc5d2cc6d169
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body also contains the same redirector URL, suggesting an attempt to trick users into downloading malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=global+automotive+industry+2020+pdf
    • http://lokan.manhattanhope.com/uploads/1/3/2/3/132303410/8995853.pdf
    • http://files.transformingbarriers.com/uploads/1/3/1/4/131438420/rozipupix.pdf
    • http://files.lorrakurtz.com/uploads/1/3/0/8/130813357/jesubokewexokupasom.pdf
    • http://pemiwetu.bowleyconsult.com/uploads/1/3/1/8/131857315/vanufonup.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/70851064862.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/4521463746.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/sukunulaginonumititiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6503/files/suzuki_50_cc_atv.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/94872626741.pdf
    • https://cdn.shopify.com/s/files/1/0439/1079/1323/files/48249522236.pdf
    • https://cdn.shopify.com/s/files/1/0441/2735/5032/files/67133173070.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3718/files/dasevak.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/tebirarijivunatagixivuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/tipos_de_tornillo_de_banco.pdf
    • https://cdn.shopify.com/s/files/1/0428/4914/0902/files/lokugatevifitajejolareso.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/95574791698.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/kokaninukorisezus.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/jasakamoj.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_off0000670e.bin
dc94d023ce91953c42d719437bad48db65701c60be60091f7cd2fd0082402231
pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 5792 bytes
font_01_sfnt_off00007abd.bin
ce551ce25cc91d144e30c59893ab401ef30b2ec43bf1db3915f5f8f55ae6f334
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABD 15748 bytes