Malicious PDF — malware analysis report

Static analysis result for SHA-256 42052c5e985bd9e1…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 19:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 630ec839028f8122836bd0a7a5772ed1 SHA-1: 285464b5edc988587ba2a2fd71a60630a0e84656 SHA-256: 42052c5e985bd9e1b46c64fa3769c5f0a87e4c0919cf5b3dc92a2e94415339b2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.cc`. The document body, though heavily obfuscated, contains the URL `https://ttraff.cc/pify?keyword=calendario+festivos+colombia+2020+pdf`, suggesting a lure related to Colombian holidays. The PDF also contains a large number of external links, many hosted on `cdn.shopify.com`, indicating a link farm strategy. 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.cc/pify?keyword=calendario+festivos+colombia+2020+pdf
    • http://files.mammothnest.com/uploads/1/3/1/4/131483662/7997212.pdf
    • http://files.thelearningkirb.com/uploads/1/3/0/8/130813325/jebovewiz.pdf
    • http://kefomivav.re-electgregbeck2018.com/uploads/1/3/1/3/131384281/lutovufi-ximanigefoza.pdf
    • http://files.kuhl-therapies.com/uploads/1/3/1/4/131437308/zolebapukor_wasevewe.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/jijobiwovaxuvojabonedoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuzizurogepibisomagin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwakuda.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/fiwifitelavitejufak.pdf
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/4963427450.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/89697142796.pdf
    • https://cdn.shopify.com/s/files/1/0437/4170/8437/files/23187731505.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/luvutalanopijomakel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/vovirujevezofiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/apologetics_ravi_zacharias.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/newesogawisofaduv.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_off00006222.bin
9ffc44bc725757bf9087f1bdd3fc5e1157145cdbb9dbfebfec0c1ca0d8cfd8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6222 5680 bytes
font_01_sfnt_off00007562.bin
67c03871f6dfb8caaddb4bcb1a830a939569707fe5414ebe8a4fbb290e0b853a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7562 11436 bytes

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