Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e6579320c99ee1…

MALICIOUS

PDF

115.5 KB Created: 2020-08-20 11:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c2c84f8cf89d65859d89ff7351b6f6 SHA-1: dc20b152f9507bc4890ea8308bf07ba957073ea3 SHA-256: 25e6579320c99ee173964d8902b577bdcccc9f02d4b797a7bb11c584b05acc6b
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.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though partially corrupted, contains the same keyword found in the malicious URL, suggesting a lure. The primary intent appears to be redirecting the user to a malicious site.

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.cc/pify?keyword=cessna+310+specifications+performance
    • http://files.charlesheinerfiction.com/uploads/1/3/0/8/130873875/3662700.pdf
    • http://files.bsla.org/uploads/1/3/1/3/131398362/novibulipozel_rixaxaxewafubi_ruxerewaxazog.pdf
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/pejibobozerovulesawawuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8258/0130/files/ripijimulalevipatun.pdf
    • https://cdn.shopify.com/s/files/1/0448/2210/2173/files/advantages_of_using_audio_visual_aids.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6695/files/negative_binomial_model.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/34234755329.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/amana_heating_and_air_conditioning_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0614/8255/files/cambridge_english_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/61610641264.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/biological_oxygen_demand.pdf
    • https://cdn.shopify.com/s/files/1/0435/2534/1343/files/49194714011.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_off00017c32.bin
d5b5958ee683b345316b413af9932e99b5d7195bd40479ccb670d3c098ee4b7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C32 5392 bytes
font_01_sfnt_off00018e6d.bin
494fe57c2ebc9bf399909e18cf2ea5bd7ee5870099f77840a9d5af2095ef3e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E6D 15504 bytes

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