Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd88ec2f3a6e0aae…

MALICIOUS

PDF

36.3 KB Created: 2020-08-20 19:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 785f3d93eba4c380f6cf148854c80dcc SHA-1: a14a3f045b379e1c2d00e40fc3570eba2fec0fed SHA-256: dd88ec2f3a6e0aaeb934e4d6f58041dd4eb9d50cb6572cec37370f75cd9edd3b
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links. One prominent URL, 'https://ttraff.ru/pify?keyword=combine+like+terms+worksheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links hosted on Shopify, suggesting a coordinated effort to distribute malicious content or manipulate search engine rankings. No scripts were extracted, and the primary malicious activity appears to be link manipulation and redirection.

Heuristics 3

  • 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.
  • 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=combine+like+terms+worksheet
    • http://files.lancastercountyxc5k.com/uploads/1/3/0/8/130874599/zogigiboli.pdf
    • http://jonujaw.northiowadragway.com/uploads/1/3/1/4/131437679/webusovunusizak.pdf
    • http://files.iaabo152.org/uploads/1/3/0/9/130969623/bf75db295d49b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/84428503554.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/lopikejebegamikopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/wodegufabamuvaromewapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/talemaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/riwuzoxuruwubipaxitevun.pdf
    • https://cdn.shopify.com/s/files/1/0449/8518/8511/files/guberuxasosidoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2097/files/tisitetemobuzuli.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/42316452131.pdf
    • https://cdn.shopify.com/s/files/1/0434/4617/3852/files/3092800741.pdf
    • https://cdn.shopify.com/s/files/1/0437/2670/0696/files/59069159220.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/gezogifukinev.pdf
    • https://cdn.shopify.com/s/files/1/0436/9317/9030/files/22411872494.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_off0000524d.bin
019838ddb97217931d3236efd63d156df9c7b3fc83feb2911b7f2cab27e518f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524D 4916 bytes
font_01_sfnt_off000062e7.bin
6467730bc3dcbbe1ebdfacf42950c8e16ba9379e0422a3f5831e05e5217ad798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 9896 bytes

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