Malicious PDF — malware analysis report

Static analysis result for SHA-256 158c2746f5e13fe1…

MALICIOUS

PDF

35.8 KB Created: 2020-07-31 21:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bcb61dff8c6e1b7e70e6143effe9e5c SHA-1: 5944b8453543186863304c5fdd4a3abd36ff86ec SHA-256: 158c2746f5e13fe1656c053662ea68281f6d07a0b4b99c36ac9f1ca91881a4ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a malicious redirector, ttraff.com, which is likely used to host or distribute further malicious content. The document body also contains numerous links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=elf+bowling+1999+download
    • http://files.sweetdreamsconfectionsco.com/uploads/1/3/1/0/131070178/8d298.pdf
    • http://files.eastshorechurch.net/uploads/1/3/1/4/131453100/lufimamuxovivu.pdf
    • http://files.richmondareamensa.org/uploads/1/3/2/8/132815183/vikunon-masupojolemeri.pdf
    • http://files.czech-club.co.uk/uploads/1/3/1/4/131407227/9289852.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/30663870002.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/31744108829.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/gipamuwokudanixofapufipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/16741968193.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/nabikuwetovuwubusodofit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/kikabul.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/25167562169.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8349/files/xajewomikijesibupogogit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/sotusigogovabolipasip.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/xivefusij.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_off00004cd6.bin
74c3c52c7aca3a4d05ffa87a75ae4942675faff0178b99bd95fea0a75320d646
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD6 5196 bytes
font_01_sfnt_off00005eb7.bin
df7de88036d65bca3f1029eeda9921baf986fa44032c6e1560de14eccd67b9f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB7 10164 bytes