Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d03df144508d91f…

MALICIOUS

PDF

64.4 KB Created: 2020-08-25 08:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d7505ab6cbcd2581a1af4b5d857d998 SHA-1: c6c182ed10fd41812583374d8a96cc8b719505a5 SHA-256: 3d03df144508d91f86f4e731740d8b6dcfefc25d2ac38bf5bbf1a13d8b78fac1
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains keywords related to schizophrenia and the malicious URL, suggesting a social engineering pretext. The presence of a large number of embedded links, many pointing to Shopify domains, indicates a link farm used to obscure the ultimate destination and potentially for SEO poisoning.

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=schizophrenia+auditory+hallucinations+pdf
    • http://files.christineannjewelry.com/uploads/1/3/0/7/130739063/e661d39c6a4.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/52405021599.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/xoninafesokabexusafud.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/the_gospel_of_matthew_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/94906664299.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/kurugufelolorululogixikod.pdf
    • https://cdn.shopify.com/s/files/1/0436/5395/5742/files/51730360796.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/29470019188.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/gibapoguvoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7241/3079/files/xivenizejakawasesokozane.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/93668153941.pdf
    • https://cdn.shopify.com/s/files/1/0433/2240/9125/files/15051824356.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/94394744741.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/arm_controller_free.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_off0000be13.bin
d4a131dc2f7385390cd60c9fbbae901c8013f11b59a3dc34e8365fdd0e001e3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE13 5496 bytes
font_01_sfnt_off0000d0c1.bin
f3c4ec492466f5b2cd70f979f84d39a4ea5c2e3bd2695ea3608b333c9c06c559
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C1 10404 bytes