Malicious PDF — malware analysis report

Static analysis result for SHA-256 679e396891499382…

MALICIOUS

PDF

49.3 KB Created: 2020-08-07 22:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f2b62243959a1e6c9a3dd891d8c3fc2 SHA-1: 094a571e29738436255e2a3206637a0c04dfd81e SHA-256: 679e3968914993827de3c0d1f1b0563ed544952cae6a91f04a69f64251f962fc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary malicious link redirects to `ttraff.com`, a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's content and structure suggest a phishing or scam attempt designed to lead users to malicious infrastructure.

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=sample+mba+recommendation+letter+pdf
    • http://files.electrikhana.org/uploads/1/3/1/4/131438823/6308948.pdf
    • http://files.the-therapy-centre.com/uploads/1/3/0/7/130739060/birubuwururabila.pdf
    • http://files.glambyjac.com/uploads/1/3/1/3/131379343/5922194.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/lovilepipewulojoxotetep.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/bseb_matric_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/95183817338.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/toastmasters_competent_communicator.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/78249319174.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/72979428058.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/rizejimi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/12217094902.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/5110566516.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magej.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/ladaz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000755d.bin
369dee79e1b0d63fbcbbe61b40dba6c3c78050939b4375c48dcdf9e49df2ea36
pdf-font-stream PDF embedded font (sfnt) at offset 0x755D 5152 bytes
font_01_sfnt_off000086b6.bin
1ee79c47b258f51efaef6ed2d1c9c97c236d11b1e9eda8415d9cfbc6a9a51257
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B6 10404 bytes
font_02_sfnt_off0000aa4e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4E 4324 bytes