Malicious PDF — malware analysis report

Static analysis result for SHA-256 79084402473f6dc8…

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 01:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22a494c75bea33741e45ca6f23891de7 SHA-1: b9b21eca0da6e2da0ac8203f59431858bafdf824 SHA-256: 79084402473f6dc897d8b4d6e96eb6596087ef6829a358b5810cbebefce31b57
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector at 'ttraff.club'. The document body, though heavily obfuscated, contains the text 'Cute baby girl photos' and the malicious URL, suggesting a lure to entice users to click on the malicious link. The presence of numerous links and the malicious redirector indicate an attempt to lead users to malicious content, likely for phishing or malware distribution.

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.club/wix?keyword=cute+baby+girl+photos
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/ashrae_62._1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/lerakixiwejotodemisijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/44278580823.pdf
    • https://cdn.shopify.com/s/files/1/0439/4775/3640/files/veduvusivuxemabegivuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/wades.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/55318317915.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/noxegudotizixojuluwate.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/54018683983.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/asvab_mechanical_comprehension_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/zofuzozabadikefavod.pdf
    • https://cdn.shopify.com/s/files/1/0437/4423/1575/files/funciones_del_director_general_de_una_ong.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/rudevok.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_off00006599.bin
b1433a03ab75081dbf922a85e3a8a7b869b1b286b9c27f13fe34d6691cb8b816
pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 5228 bytes
font_01_sfnt_off0000775d.bin
7fe1587ca6c9e20728c5362a2576abc50056f47e378ccf937ec1cc09a804e918
pdf-font-stream PDF embedded font (sfnt) at offset 0x775D 10128 bytes