Malicious PDF — malware analysis report

Static analysis result for SHA-256 946c6bf888af3624…

MALICIOUS

PDF

39.6 KB Created: 2020-08-18 22:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 343230960079beea54b099faa3c1c7df SHA-1: d75b3434e0ccd0a443bc5e4e7ce89a8963ee2c2b SHA-256: 946c6bf888af3624d63caf0264b8c0db33f9bfef01020eec970ae97e4953783f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains numerous links, including a critical redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Adidas men's clothing size guide' and the malicious URL, suggesting a social engineering lure. The presence of a large number of external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the primary attack vector appears to be the malicious redirection link.

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.cc/pify?keyword=adidas+men%2527+s+clothing+size+guide
    • http://files.pathuberartwork.com/uploads/1/3/1/0/131070733/1992815.pdf
    • http://gasel.marsdenhoa.com/uploads/1/3/1/4/131453247/15f0731.pdf
    • http://jafedori.productcampsg.com/uploads/1/3/1/3/131379552/1607707.pdf
    • http://files.villagevoiceschoir.net/uploads/1/3/0/7/130739062/6223390.pdf
    • http://xezut.sarahohdesigns.com/uploads/1/3/0/8/130814011/xogosotatod-sixurufuvelebok-lesarutoniwojav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9522/files/sojosasebakanamofufujexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/xebabiwoduwojezojubu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3569/files/alora_orientation_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/aptitude_test_questions_and_answers_for_freshers_tcs.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/13313957013.pdf
    • https://cdn.shopify.com/s/files/1/0435/1236/5211/files/92858626759.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/carcinoma_de_pequenas_clulas_de_pulmo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/69256067915.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6646/files/excel_assignments_for_college_students.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/76287585300.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/la_seine_lyrics.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc0.bin
ebe1e302322de888ec5a074b35683775d5fff32efb32f2a705414aca5eb281d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC0 5332 bytes
font_01_sfnt_off000061c9.bin
96457fce971c642805562456db69457c22814f7d908f8ae58168ce3939c442f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 14964 bytes

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