Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb7a246463dd0c3…

MALICIOUS

PDF

40.0 KB Created: 2020-08-21 08:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee10e159ef583e5c34f527253f95cc9f SHA-1: f5fa1f7082d1c34e83dd5a9ad786e32a1e9a288c SHA-256: 2bb7a246463dd0c3747b590f486ae9bef56e9e9bd567bf4bb007be5ff2bea48c
152 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, many of which point to a link farm hosted on Shopify. Crucially, one of the embedded links redirects to the known malicious domain 'ttraff.com'. The document body appears to be obfuscated or corrupted, but the presence of numerous links suggests a phishing or redirection attempt.

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.com/pify?keyword=senses+thalamus+processes+information
    • http://pifenirar.theelementsexchange.com/uploads/1/3/1/4/131437987/ruloxijadajamekup.pdf
    • http://tivufugu.libertylawgroupla.com/uploads/1/3/1/4/131407089/2452239.pdf
    • http://files.russellraysilva.com/uploads/1/3/0/7/130738970/2317154.pdf
    • http://sikog.churchesofchrist.com/uploads/1/3/0/8/130874431/tuxozib_lenezeterawijak_munabuvo.pdf
    • http://files.snugnut.com/uploads/1/3/1/0/131070035/6416fab392091ad.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/54659058714.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/auditors_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/1560/9252/files/universal_hollywood_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/jilagupilajoxez.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5066/files/wupazik.pdf
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/21862926287.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mejiwevabefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/baumer_ch_8501.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/post_conference_debrief_template.pdf
    • https://cdn.shopify.com/s/files/1/0448/5994/9218/files/29736563540.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/zygmunt_bauman_liquid_love.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_off000060ed.bin
a14fb64c4f9bc5ca9746c8c3badb8cca0a8308827f5678960e4b6ede586c709a
pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 5356 bytes
font_01_sfnt_off000072f2.bin
a16f89db3682ceb28db6b15774198793d1c5378106d6d986e7e2c8983d241b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 9424 bytes