Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f7a0aa0262367d…

MALICIOUS

PDF

44.6 KB Created: 2020-09-18 22:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f413f348d95f8fddd28ac5a27e36b0b SHA-1: 2897582f131fb9e8cf7b2e53b966e12901b34d8b SHA-256: 19f7a0aa0262367da85c2d34152db057af902bf011be1aac12bd439d60353379
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to distribute malicious content. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware download page. The document body contains garbled text and some URLs, but no clear narrative beyond the link farm.

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.me/wix?keyword=polo+g+sub+count
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogudanivivakow.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/75269109409.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/gezuvewubopiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/76041331658.pdf
    • https://cdn.shopify.com/s/files/1/0466/5281/7573/files/vector_gallery_blogger_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/bricks_vs_balls_breaker_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/basixigu.pdf
    • https://cdn.shopify.com/s/files/1/0484/2858/1021/files/tm_meditation_mantra_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/absceso_hepatico_cirugia.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2257/files/75562367190.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/chronic_fatigue_syndrome_patient_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/12867266367.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_off00006897.bin
4dd149575373f31aeb3c5dfbaf327da298524d936b42313362b7dd6f30556194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6897 4800 bytes
font_01_sfnt_off0000790a.bin
a767d38d6740ca1daa31c753ee4ec58c803a3aef825828cdec19169870f7659c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 14556 bytes

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