Malicious PDF — malware analysis report

Static analysis result for SHA-256 6272a3fb10445290…

MALICIOUS

PDF

38.0 KB Created: 2020-09-18 08:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14d1cd2346a73cc7a107770c8a25f8aa SHA-1: 61e18faaddefe0720133e7d8c4f5a35b5ccddc95 SHA-256: 6272a3fb104452901951b15eab493f268c80c9c53c37e3d16e1d1ce2d4c042d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, 'https://ttraff.link/wix?keyword=the+barcode+tattoo', which is likely intended to lead the user to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, some of which are hosted on potentially untrusted domains. The ML classifier strongly indicated maliciousness, supporting the conclusion that this is a malicious document designed for user redirection.

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.link/wix?keyword=the+barcode+tattoo
    • http://taxes.n3vem.com/uploads/1/3/0/8/130813059/tovezolegi.pdf
    • http://files.ocsny.org/uploads/1/3/0/7/130776054/muworikudazubux-zazeni-wuvubepajuxokut.pdf
    • http://nifejinij.wethammockfarm.com/uploads/1/3/1/8/131856177/6270512.pdf
    • http://boraverek.mahsamohaghegh.com/uploads/1/3/1/6/131606345/3cd4d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0505/6920/files/expert_betting_tips_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/panasej.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/4279029876.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/92579141318.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/cambridge_english_empower_b2_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0449/4481/8335/files/82629096680.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_off00005908.bin
db99ca88ff650c795bca6d0cf1101240b956879870b6d0928afb06e09b367bec
pdf-font-stream PDF embedded font (sfnt) at offset 0x5908 4908 bytes
font_01_sfnt_off000069ab.bin
e12ad84b822d53017139101622599353e9e1c7ecb2c2c2585693830d7d245d4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x69AB 9968 bytes