Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbdd8b17fe0fe1f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 06:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c87b2eac5fd6dabd99434f2cb80f357a SHA-1: a11ae3747164871553f7243f6fde9851ea6c8bae SHA-256: ccbdd8b17fe0fe1fb3fdfb8ae200c016a2c70c32ea15c5a9adb520dc27bd80bd
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=argumentative+communication+pdf, which is designed to redirect users to potentially malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm for SEO manipulation or traffic redirection.

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=argumentative+communication+pdf
    • http://files.langsidechurch.org/uploads/1/3/1/8/131871501/8813036.pdf
    • http://files.hairbecausewecare.com/uploads/1/3/1/8/131856624/7918d90d.pdf
    • http://files.thefloriculture.com/uploads/1/3/0/7/130738830/5218584.pdf
    • http://files.soulelectricliving.com/uploads/1/3/2/6/132695633/lavosuwoxevokafo.pdf
    • http://files.craftedbyhand.shop/uploads/1/3/2/8/132814084/5132218.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/2013_kia_sorento_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/toxure.pdf
    • https://cdn.shopify.com/s/files/1/0437/8086/6197/files/21462879742.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/5996585452.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/bekewawosesu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/77181533477.pdf
    • https://cdn.shopify.com/s/files/1/0433/8932/1366/files/troy_bilt_horse_xp_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7776/3226/files/zuriradojilitoropokored.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/zozabepusulafesenogam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/pufuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/2049/9616/files/juwepelilozofogune.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_off00006b54.bin
5dde9bccbadbe0980b55c626410a772535cad7ffa9257786358f036b021e467b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 5312 bytes
font_01_sfnt_off00007d5a.bin
731df8f6cd4425ea9ea91c5da338fd90a983ea4cd3e3c2c0a3b66124c7b7ce41
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5A 9988 bytes