Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f96c259e0e163eb…

MALICIOUS

PDF

34.5 KB Created: 2020-08-23 07:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39ea6aff94327a1a43328b0c828ecb35 SHA-1: 1621ee8940daec325021fe85337f47d6eed008de SHA-256: 6f96c259e0e163ebb66785089bee8dfa2028c8e79eddba5d8d14858a20f57381
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the malicious URL and appears to be a lure related to movie songs. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or phish users.

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.ru/pify?keyword=alexander+tamil+movie+film+songs+free
    • http://lirev.jeffbeckpersonaltraining.com/uploads/1/3/1/3/131398591/8872a41b.pdf
    • http://mozumedi.parkscapital.com/uploads/1/3/2/6/132682883/2287337.pdf
    • http://files.phonecharmed.com/uploads/1/3/1/8/131871780/c53bd33251.pdf
    • http://files.faithkingwriter.com/uploads/1/3/1/3/131380045/fanagisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/jikasulobaxavogejuno.pdf
    • https://cdn.shopify.com/s/files/1/0449/8771/1656/files/casals_song_of_the_birds.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/da_form_7223_bullet_examples.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/big_data_analytics.pdf
    • https://cdn.shopify.com/s/files/1/0460/4008/8740/files/name_3d_shapes_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/wilusasuzuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8274/files/wikuxanowanokifabi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/wpf_combobox_itemtemplate_selecteditem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0689/3985/files/universal_sign_language_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/basic_electronics_nptel_notes.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_off00004945.bin
565c3b06450624ad6f81f32e85265d07ad27c7fd1cbddcc1df494d9696aba195
pdf-font-stream PDF embedded font (sfnt) at offset 0x4945 5344 bytes
font_01_sfnt_off00005b66.bin
1e2b99bb7fde6de01c6c39104b66270ceac6225d7a6eb89ed72dd15653638843
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B66 10072 bytes