Malicious PDF — malware analysis report

Static analysis result for SHA-256 115275e51570091c…

MALICIOUS

PDF

41.1 KB Created: 2020-08-21 14:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc114cb94dc4885e57824393f8c8dbb2 SHA-1: f880a214ecee01eb7a1ad2b813e4fdc52403a626 SHA-256: 115275e51570091c62203cf458c246e6ffd51c8e45c96c4b4976ad7c7bd62c4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document's primary purpose is to host a link farm, likely for SEO manipulation or to distribute further malicious content.

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=gta+sa+cheat+menu+mod+free
    • http://files.longmontsistercities.com/uploads/1/3/2/6/132695280/8747764.pdf
    • http://files.no-clout.com/uploads/1/3/0/7/130775635/zenonifilarut.pdf
    • http://zinogefi.lindatully.com/uploads/1/3/1/4/131437987/7208716.pdf
    • http://govisatos.digitalpreschool.com/uploads/1/3/0/9/130969744/3336511.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/bawizidezejiweruvotutazub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45484104345.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/geophysical_survey_for_groundwater_exploration.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/84845346207.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9818/files/jemumufefabowuwifigow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/all_souls_trilogy_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/69985142728.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_off00006260.bin
4ec5e37c964f0ecf91604b96792b6baf925a6cfc2afe7c6ab2040994c8e1f942
pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 5260 bytes
font_01_sfnt_off00007418.bin
add918f451f9eac7d464a4a34957a4db4df81f3b2a8cba59edfd9c7c5f4aa0a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 10356 bytes