Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebd4bd8cdc36d24…

MALICIOUS

PDF

53.0 KB Created: 2020-08-03 19:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b179b66b6e809fabb3f89f81f8ee8a3d SHA-1: 208e5c3486491eb9c3e939f0117a47e3e08b8ca1 SHA-256: 3ebd4bd8cdc36d24666693f4b2f287f183537f9b322326881fed851698e6b6fb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this is a PDF SEO link farm, designed to host numerous external links. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=features+of+forward+contract+pdf
    • http://files.burlingtonedisonlittleleague.com/uploads/1/3/1/3/131381428/4846565.pdf
    • http://files.fortworthfirevolleyball.com/uploads/1/3/0/7/130775180/kidebugibapabidivam.pdf
    • http://files.three54.co.uk/uploads/1/3/0/7/130775639/3932064.pdf
    • http://files.loyalwillcaninehydrotherapycentre.co.uk/uploads/1/3/0/7/130739116/667ede6.pdf
    • http://files.davidgoldsteindesigns.com/uploads/1/3/1/4/131438456/25698c.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/82256377596.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/megaman_battle_network_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/jowuzipezofugopopomidat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8765/0211/files/vezokinojasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/fomak.pdf
    • https://cdn.shopify.com/s/files/1/0433/2018/0894/files/dinos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/puzokotifuritananewer.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/nejapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/xekudipu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/javascript_map_to_json.pdf
    • https://cdn.shopify.com/s/files/1/0427/8868/3932/files/bifotipuzobexatupalomil.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_off0000889e.bin
d6ffe7d19b988bcffc6ea59be552e35bc0bee81bbd16b6ef151a24511b1813d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 5164 bytes
font_01_sfnt_off00009a58.bin
85f269842748007588daa848456a102f392bd568ef7153dc0a581cad244c2460		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A58 13920 bytes

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