Malicious PDF — malware analysis report

Static analysis result for SHA-256 6177ac9a1ef86cf1…

MALICIOUS

PDF

47.6 KB Created: 2020-08-13 03:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e214748993ebc433d46de16df22d014a SHA-1: b0d771907c1225389ab6fc7104497c33e0aaaa16 SHA-256: 6177ac9a1ef86cf16e6ece5cc5d0726479cccee419de82d28381c48fc17d19a7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites. One of these links, 'https://ttraff.com/pify?keyword=benzene+msds+sigma+aldrich+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=benzene+msds+sigma+aldrich+pdf
    • http://files.tsunami-softball.com/uploads/1/3/2/6/132682663/fikupolizinov-waxowowe-bojakanibuz-nivatu.pdf
    • http://files.mainecoonfranceselfie.com/uploads/1/3/0/8/130874104/fb34e.pdf
    • http://files.associatedoptical.com/uploads/1/3/1/4/131453214/peruvisite-valolufifo-nusoloseguzonev.pdf
    • http://files.catherinehessart.com/uploads/1/3/0/7/130740138/ef0678.pdf
    • http://sefevofab.linmog.co.uk/uploads/1/3/0/8/130873965/4dfcf242c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/xokunepiladi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2248/files/openstax_calculus_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/1._7._10_xray_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/99641556932.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/12523826858.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/autocad_2020_printer.pdf
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/28097855523.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/christopher_columbus_journal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/70730591327.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/ciaphas_cain_series.pdf
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/vujupow.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/anti_air_deathblow.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_off00007af5.bin
0d5ee7d9ae07c9e2d08995eae88ecf96f086551583dfd0b997a48be20916021d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF5 5668 bytes
font_01_sfnt_off00008e13.bin
9ccb1f35a57cf3a75d3c5fe7120d14b4dc966b117f43a4ff1b6ad80741ec55e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E13 10352 bytes

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