Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9609f017d76e37d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-02 04:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 182f22c49624ea15ae165953c4eaf511 SHA-1: 8170299d3704b83258c9ac06ce6646081b217a9f SHA-256: a9609f017d76e37d824de3019dd968c0f54028e0112619e1305f7ce7b135ef2f
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to 'ttraff.cc', suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the text 'Bmw dashboard warning lights chart' and the malicious URL, indicating an attempt to trick users into clicking through to potentially harmful content. The ML classifier strongly supports the malicious verdict.

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=bmw+dashboard+warning+lights+chart
    • http://files.rara-risk.com/uploads/1/3/0/7/130775672/sizidizoguvesor.pdf
    • http://files.theglasscarousel.com/uploads/1/3/1/4/131453365/25319.pdf
    • http://files.wichitafallsbridge.com/uploads/1/3/1/6/131606128/624ac.pdf
    • http://files.billiardspress.com/uploads/1/3/2/6/132683070/2217586.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/18325261598.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.pdf
    • https://cdn.shopify.com/s/files/1/0434/3382/0322/files/sulobogelomogojexak.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/buzisota.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/jufukovos.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/80003436940.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/85958195183.pdf
    • https://cdn.shopify.com/s/files/1/0448/0575/0946/files/david_lay_linear_algebra_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/disomip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2093/files/dusumesezawegupifod.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_off00006780.bin
828bd0b507f60f4f2f2c1d0ab95ca2b831e57498a2ab3fc528fb4ecb63c7e296
pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 5632 bytes
font_01_sfnt_off00007a88.bin
5d759b2ccfd17abe8aebf1dff6a16efd77570c573c190b55f0d9c002e337669a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A88 9896 bytes