Malicious PDF — malware analysis report

Static analysis result for SHA-256 336d0cf254aa48fa…

MALICIOUS

PDF

52.6 KB Created: 2020-08-24 10:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5465ec6d09ed0fb792b848ea088d9f SHA-1: 16b077fc211d29336008a732536ee0d89d549cc7 SHA-256: 336d0cf254aa48fab58cdf335e6fb6d62769b61906aaea867f60e03a01610bb1
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious infrastructure at ttraff.ru. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a malicious site, 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.ru/pify?keyword=bootstrap+image+list+template
    • http://sepowo.ellawatkinsbusiness.com/uploads/1/3/1/3/131378780/gupovilupukawije.pdf
    • http://zojawe.victoriacookson.com/uploads/1/3/0/7/130775734/4016052.pdf
    • http://files.joanobeirne.com/uploads/1/3/1/8/131871902/judada.pdf
    • http://xabiz.guavagroove.com/uploads/1/3/1/6/131636612/443f2ece.pdf
    • http://files.townofgreenport.com/uploads/1/3/1/6/131606127/gisifilomapusij-tovobu-vasuwovik-zepaxuwij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/18872763582.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/xubimoneku.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/47214582042.pdf
    • https://cdn.shopify.com/s/files/1/0463/4650/2306/files/rivelevamexupawaxafolul.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/landscaping_resume.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/23757344473.pdf
    • https://cdn.shopify.com/s/files/1/0439/3422/0456/files/93735288527.pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/the_inheritors_william_golding.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/dinemutazumunetos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/free_excel_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/naruto_shippuden_episode_392_english_dubbed.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_off0000917d.bin
6e0f37dc9024643da4d9853c69c5d7e32c6b4557e27f50da39b57ac318882589
pdf-font-stream PDF embedded font (sfnt) at offset 0x917D 5188 bytes
font_01_sfnt_off0000a30d.bin
db520843a50a9a2923ab15206e71418fe2b73c67ae4eb3293601998f6a5fe4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xA30D 10152 bytes