Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc057289284d51bd…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 05:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f271768126e2bd060e0c63b18b619a67 SHA-1: 4737464ce80e22d33d7e8e93f80be08fc0641ff6 SHA-256: dc057289284d51bd05efec72c5fa679ac4364f3853ef038916a9ed2b21d15911
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which likely serves as a lure to a malicious payload. The ML classifier also strongly indicated maliciousness. The document body itself is heavily obfuscated and contains the redirector URL, suggesting it's part of a phishing or content-luring scheme.

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.cc/pify?keyword=jannes+and+jambres+pdf
    • http://files.charishomes.com/uploads/1/3/1/0/131070325/sojawinutajoko.pdf
    • http://files.stacisstitches.com/uploads/1/3/2/6/132695294/fijalelu.pdf
    • http://files.nationsmidwifery.com/uploads/1/3/0/7/130776619/c01fed51cfc0a.pdf
    • http://files.ginetteandmichaeladopt.com/uploads/1/3/1/4/131453267/3812594.pdf
    • http://files.3lionsfarncombe.com/uploads/1/3/1/4/131455903/2220719.pdf
    • https://cdn.shopify.com/s/files/1/0428/9927/5935/files/kederudatirewefogesariz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/37381253302.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/69993086780.pdf
    • https://cdn.shopify.com/s/files/1/0435/2311/3119/files/poxogemigudopilisadabokeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/lotopolifuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/biriredozupog.pdf
    • https://cdn.shopify.com/s/files/1/0433/5019/6389/files/63149304969.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/69497645999.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/bagipugumivuzogodazujoner.pdf
    • https://cdn.shopify.com/s/files/1/0440/6591/5045/files/wadebapoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/83113720143.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8106/files/22516424432.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_off000065dd.bin
7a42fc2be421856fbcb0702c1421e77dbc98234310718870e21d52f6af9a6c65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DD 5360 bytes
font_01_sfnt_off000077fb.bin
8823a08efdff7612dea22e6bfb12dc8abc8a90110d2c693e84ccd5baa119c6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FB 11804 bytes

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