Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cbd6c5e6801e3a2…

MALICIOUS

PDF

36.1 KB Created: 2020-08-18 23:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a907529c6cbfd7f2f6857d0e5162216 SHA-1: 5ced4bdf2aa7a06e7dd27d799c7da79db345c53f SHA-256: 0cbd6c5e6801e3a2306284d99cb59c40522f15a54dfed3ed4e10225fc3633afc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, characteristic of a link farm, designed to direct users to external resources. One of these links, https://ttraff.cc/pify?keyword=clery+reportable+offenses, is identified as a malicious redirector, indicating a phishing or malicious content delivery attempt. The ML classifier also strongly flagged this PDF as malicious.

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=clery+reportable+offenses
    • http://files.mvestatehomes.com/uploads/1/3/1/3/131398377/dopikutulutupo-xotikosuxe-zumamokiz.pdf
    • http://lizef.parsakhorshid.com/uploads/1/3/1/3/131380600/c22e4.pdf
    • http://files.merriemoore.com/uploads/1/3/1/3/131383838/9b4032b1.pdf
    • http://files.countertopministries.com/uploads/1/3/1/3/131379246/migerujivesa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/what_is_an_example_of_a_caption.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/bajog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/12673439574.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fuwemosuwizukuxitakalav.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7205/files/liver_cirrhosis_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/divarav.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/29454317054.pdf
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/ximamanodimisik.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6260/files/59361563107.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050b0.bin
6c0bffdc0a4edb296fe201b0c448d4c862545c6280a29b4ed7c28373ea48f31e
pdf-font-stream PDF embedded font (sfnt) at offset 0x50B0 5040 bytes
font_01_sfnt_off000061e1.bin
95f2c13ef7224250787a1e428806d31bb76f830e3fde3f17d7eeb2d382389bbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 9956 bytes