Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cc64475818c87d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 23:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09749cbb942b317f6d0eca4e86a521b7 SHA-1: dcaefb6f822618a50c99016433a799eb3020818f SHA-256: 72cc64475818c87dc88da003ca13dc720b8f794658f49785f79f985a78bdef3d
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 a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=talk+yourself+into+it+pdf. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to obfuscate the malicious intent through a large number of links.

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=talk+yourself+into+it+pdf
    • http://files.mythicfirecreations.com/uploads/1/3/1/0/131070940/divadifutufos-sewajit-derun.pdf
    • http://xiwebu.roanokevabahaicluster.org/uploads/1/3/0/7/130775052/vozum_liloranitezaw_rulapep.pdf
    • http://files.supremexjoy.com/uploads/1/3/1/4/131453651/xunir.pdf
    • http://bojibuki.ashlynmariephotography.com/uploads/1/3/2/6/132681513/4565382.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0795/0495/files/40929216957.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/90351785121.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2100/files/16941059980.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/xotupuwasananariv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/xalufomelekusevoxaporo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/gujijipisakijakasurupigij.pdf
    • https://cdn.shopify.com/s/files/1/0438/5823/1461/files/lajute.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/6675699864.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/zasimazitubuzabomapag.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/woneletetikak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/risetirowulikaketevot.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/wamaxutasili.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_off000066ae.bin
d983741c986ecf7af789820beb589c987ce52fff757f7fba556fa2d9d4601cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 5148 bytes
font_01_sfnt_off0000784f.bin
f045bd27cc14687e94c8ff39ac30f192f7c8c6eb93882320440b6448e47a335f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784F 11672 bytes

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