Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6f175932df478d…

MALICIOUS

PDF

76.2 KB Created: 2020-08-17 07:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7fa80d4404e11ec33de8a6412f94058 SHA-1: 4912cfb8de197d01e3ce44696e255413cf6ef202 SHA-256: 4c6f175932df478d43e35427c4f8ee97ff1f9e758d5703773c1c358b902f9c66
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is ttraff.ru, which appears to be used for redirecting users to potentially harmful content. The document body contains numerous embedded URLs, suggesting a lure to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=b%2526+d+burgers+nutritional+information
    • http://files.mosquitosaregone.com/uploads/1/3/0/7/130775565/1582812.pdf
    • http://files.healthenpointe.com/uploads/1/3/1/6/131606431/zofuxipoduzatamu.pdf
    • http://files.cailenfu.com/uploads/1/3/1/4/131437444/rutez_wubusaxofab_kajali_zuwogor.pdf
    • http://files.edensmojo.com/uploads/1/3/0/7/130776110/9f61cf5bf.pdf
    • http://sebegede.hendricksfit.co/uploads/1/3/1/3/131398367/ed35932ca513584.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/gidunotefutaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/beginner_dumbbell_workout.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2243/files/losonadepulebapigobox.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/zonosa.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/pathogenesis_of_tb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/fumogukasovukexijixup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5330/8314/files/texas_dps_permit_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/docker_list_containers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/51369669922.pdf
    • https://cdn.shopify.com/s/files/1/0450/1697/3476/files/62218610838.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000812a.bin
a9408c30b3382dedcb91ecd8c850d43204ad767df4b0adbcb7ccb8b9a8c815d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 25520 bytes
font_01_sfnt_off0000d089.bin
bdbc73a719c400fdf1a1bf6a702860858fe6c53ecf4abcbd40ddd92474d0014e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD089 4204 bytes
font_02_sfnt_off0000dee1.bin
e72a2a86358d5125b88bacd5063f21ec3c208d68b9784a67e78cbb66d60e9491		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE1 13884 bytes
font_03_sfnt_off00010acc.bin
3a4606f8d76de0c13f9360d2c81d1e3d2824007d8d6c6729c8eb09750cd7fe9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 16832 bytes

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