Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1e327f9d413d18…

MALICIOUS

PDF

46.1 KB Created: 2020-08-04 18:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48c1df75d539811b4eb4493c115f473d SHA-1: f7c6d1ca7263214cff8d9f9d463f4b7ab0445924 SHA-256: 4f1e327f9d413d18634c3ad295239cffb7340bdc841b22b4ae025809da879636
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive lure promising free downloads of civil engineering books. It embeds multiple links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=civil+engineering+drawing+pdf+books+free+download', is designed to redirect users to potentially harmful content. While many Shopify links are present, one is flagged as a redirector, and the document body itself contains the malicious 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=civil+engineering+drawing+pdf+books+free+download
    • http://files.dcsav.org/uploads/1/3/1/1/131163564/389e4556c1d61.pdf
    • http://files.bedfellowsmagazine.com/uploads/1/3/1/0/131069934/9000152.pdf
    • http://files.federicoroncarolo.com/uploads/1/3/0/7/130776152/jokamoluvo-wuludumodor-sutefivijirivel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/xesenaterituxosanumen.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/56701883800.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/linus_tech_tips_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/55877793574.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/luvikumefoporedufa.pdf
    • https://cdn.shopify.com/s/files/1/0438/9044/2395/files/86327552108.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/zenefutixamawekopul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/zukufekekidol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/buwakuvunizune.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/kiwusoguxexevoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/71926721494.pdf
    • https://cdn.shopify.com/s/files/1/0435/4428/1247/files/xasezolawelev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/58476850388.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/44579789547.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_off00005f1a.bin
2ff508d1e58630ecca3eb4c348b9e67ab11e810c9aec8952b817f825bbb2fdcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1A 5468 bytes
font_01_sfnt_off000071d0.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D0 2116 bytes
font_02_sfnt_off00007b9a.bin
5944a0550f487f328bd7a065ba9ce1efc59e59cafe572541ca9732489d51e691
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9A 15084 bytes