Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fda498e0c31bb6f…

MALICIOUS

PDF

45.3 KB Created: 2020-08-08 15:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b1021587ddf8a67bae4d943858fd961 SHA-1: fb20976218455659301e266c495b3fe85b8921ba SHA-256: 1fda498e0c31bb6fe37a2e67199a97366c2890f3a9968ae4db67258f66a04e84
150 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.com'. The document body, though heavily obfuscated, contains text related to a scholarship application and the malicious URL. The PDF also contains a link farm heuristic, indicating a large number of external links, with the primary one being the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=scholarship+application+letter+pdf
    • http://files.tahd.org/uploads/1/3/1/6/131606198/mizetopumukexetiba.pdf
    • http://files.ontarioovationtwirlers.com/uploads/1/3/1/4/131407921/3711010.pdf
    • http://xewedot.crosley.com/uploads/1/3/1/6/131637814/8dbccce6b895d4.pdf
    • http://files.wiseowlwellnessclub.com/uploads/1/3/1/3/131398113/lefikulaxivivu.pdf
    • http://files.polonezdancegroup.com/uploads/1/3/2/6/132682787/254af7587.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/rugrats_royal_ransom.pdf
    • https://cdn.shopify.com/s/files/1/0429/0392/8991/files/math_blaster_ages_6-_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/kokixogutimijovikuni.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/sifanomalegemaval.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/jomikalurazofosegado.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/cuadernillo_para_aprender_a_leer_y_escribir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/craigslist_org_myrtle_beach.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/binarajafukugaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/16956271668.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/97960558471.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/possessive_pronouns_exercises_multiple_choice.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/47836464341.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/89490602920.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/ripowemigino.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.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_off000071b0.bin
a08d669063a468583613cf8f629c1f1820b48bda8feb9165d157a6eceb06cab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B0 5344 bytes
font_01_sfnt_off000083da.bin
6a61af5cfc3fcf3613021b29eea16d4dcd1e2c6e916da7efd1de9454f141079d
pdf-font-stream PDF embedded font (sfnt) at offset 0x83DA 10524 bytes