Malicious PDF — malware analysis report

Static analysis result for SHA-256 127fe246605877af…

MALICIOUS

PDF

47.1 KB Created: 2020-08-30 03:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df6e5326db599af99239e0ff9bd43619 SHA-1: 30bbc99702aaf855ca8c1694de10e5fcd09ae81d SHA-256: 127fe246605877af9f27399b5423e3c7881dfa96fd0167fe5c7f50da7f788f34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link pointing to 'ttraff.com' and a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector and a link farm is sufficient to classify this as a malicious document.

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/wix?keyword=b%25E1%25BB%259D+xe+n%25C6%25B0%25E1%25BB%259Bc+ti%25E1%25BA%25BFng+anh+l%25C3%25A0+g%25C3%25AC
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/biography_auguste_comte.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/lignospan_special_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/98640245332.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/where_to_file_irs_form_8822-_b.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/jejewiduvoreda.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6042/files/gasewomiwimawado.pdf
    • https://static.usrfiles.com/ugd/8127dd_2129bc219261430b88ef2bb75d014221.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7e32b66f6294d6b98eaf0221bf5f332.pdf
    • https://cdn.shopify.com/s/files/1/0462/8011/4325/files/eos_scorecard_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/multilingual_education_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0439/1544/4376/files/kofasodowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/nokup.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_off00006a7e.bin
ac1696ec734e1d068b31a3538f6ac0bdd523dce61174e7c4ccacc5d1882530f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7E 5824 bytes
font_01_sfnt_off00007ce3.bin
0b5cd79a90a740717323a0e203766163334f1a7dae84b310023426156b2694c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 22768 bytes