Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e65fc1896e1aef…

MALICIOUS

PDF

36.5 KB Created: 2020-08-11 20:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10328b299a9f77dfc4679f675dcd7a43 SHA-1: 89934e914e216aaff28c398dd50fc5a790115d5a SHA-256: f3e65fc1896e1aef140dc546f99e848afad0cce8e71d623c977f392d5d0ec402
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=friedman+buffer+bay+manual+pdf'. This indicates the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=friedman+buffer+bay+manual+pdf
    • http://files.sherylstillsingle.com/uploads/1/3/2/6/132682040/lesoraxuwa.pdf
    • http://files.risingstartoyfoxterriers.com/uploads/1/3/1/4/131453036/mutatifora.pdf
    • http://files.morganeducarecentre2.com/uploads/1/3/1/1/131163684/6326273.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/ansiedad_depresion_y_estres.pdf
    • https://cdn.shopify.com/s/files/1/0452/7898/6402/files/describing_things_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3643/files/english_word_search_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/xajovotibumiwisog.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/woxurujusupototonozi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4387/files/54824844025.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/what_is_pst_time.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/87038237877.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagitigupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/52939334891.pdf
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/nimupenebawuxowi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3146/0002/files/toviwukalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/biroregoferudijemeseb.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_off000050c8.bin
6624712af1a72d7ca64ad1c8dd010f7f49f4efe9452bf3652a469979f81dfebc
pdf-font-stream PDF embedded font (sfnt) at offset 0x50C8 5204 bytes
font_01_sfnt_off0000626d.bin
4370a220bb591be9edd7d46c4a152904f394d15fd2b133476f8884fb75e7ca94
pdf-font-stream PDF embedded font (sfnt) at offset 0x626D 10228 bytes