Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d6fb913cb5d1cb…

MALICIOUS

PDF

40.2 KB Created: 2020-08-09 15:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ac2168a3a6a6b4bb3f99a949a17a404 SHA-1: f60e4216e69ea9e5081fec553e8af89288e40330 SHA-256: 24d6fb913cb5d1cb3751e0174e50941a9900eafcb9ad6b0a404c6b598ff8cfde
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=medical+parasitology+laboratory+manual+pdf'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The file also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains, likely for SEO manipulation or to host further malicious content. The primary malicious IOC is the redirector URL.

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=medical+parasitology+laboratory+manual+pdf
    • http://files.agendadocumentary.com/uploads/1/3/1/8/131871854/zulufubabudave.pdf
    • http://penut.audrayorktherapy.com/uploads/1/3/0/7/130776487/8a3020613a4.pdf
    • http://xuvajazav.andyyangcounseling.com/uploads/1/3/1/4/131406082/6762832.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/72465497873.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/dr_phil_full_episode_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/45704522878.pdf
    • https://cdn.shopify.com/s/files/1/0428/6873/6166/files/gezabufed.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/aneurisma_cerebral_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/fajujudufuteme.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/xopuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/50195926668.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59044096386.pdf
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/33103478692.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/36011951226.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004952.bin
f7110c1393a1322f960bb57fa22bf46b8d83d6762cbf953ffdacaa5ca2868074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4952 5724 bytes
font_01_sfnt_off00005cc4.bin
45512330e2a0577fb58be56a13b078ac744730330954cc93c578d4717f56ee0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC4 9752 bytes
font_02_sfnt_off00007e87.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E87 16204 bytes

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