Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9994ae12e5d82a…

MALICIOUS

PDF

53.1 KB Created: 2020-08-08 02:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf6b1a41ce83920ed78609e10e6fd079 SHA-1: 8309ed195786a9a1992ea5234b5f7e589f35f3db SHA-256: 8c9994ae12e5d82aff15d2810463a2a74eda02edbce49b467006d0661dd4b022
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=electrically+conducting+polymers+pdf`. The document body is heavily obfuscated but contains the same malicious URL. This suggests the document is designed to trick users into clicking malicious links, likely leading to further compromise.

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=electrically+conducting+polymers+pdf
    • http://files.orlandodeleon.com/uploads/1/3/1/1/131163859/9656207.pdf
    • http://files.thehapi.studio/uploads/1/3/2/6/132681749/3340298.pdf
    • http://nowizon.melissahannahcccslp.org/uploads/1/3/0/8/130814017/vadefef-fosubinid-zepatamebe-nanitiw.pdf
    • http://bewazeno.cindyfishdesigns.com/uploads/1/3/1/4/131452883/d86adcb27c652.pdf
    • https://cdn.shopify.com/s/files/1/0436/0581/9550/files/human_body_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/26198462085.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/badminton_footwork_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/51190888834.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/gisodakat.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/lagawuzejejajoxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/barud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/blood_relation_reasoning_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/puvuloluwor.pdf
    • https://cdn.shopify.com/s/files/1/0436/6509/6857/files/lemufatutajonibolab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/gujadudozusok.pdf
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/26449781097.pdf
    • https://cdn.shopify.com/s/files/1/0429/0114/3715/files/dafexomoterapevajibu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7584/3736/files/chaitanya_bhagavatam.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_off000091df.bin
74ffc4cfc0ece9e0c85523a4089a27f5b4dd802828714f6de2e8c62689dff1b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x91DF 5532 bytes
font_01_sfnt_off0000a4ad.bin
281b3a0cd974ca4ad7ee8dbcfebab5c7fd4a444cde889b31d2dcb0b8de211fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AD 10240 bytes