Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ed15941b354f35…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 16:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5a0652e50299a363a6cf08795757736 SHA-1: d8431e352c9abb95e158c4cbb22cd0255c90050f SHA-256: d8ed15941b354f35857b9b82ea17ffcd9724a0f9c74f9ea3396bb5d6bccc73f7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a link farm hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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=instagram+stories+video+template
    • http://nalexen.bambus-produkte.info/uploads/1/3/0/7/130776661/111631.pdf
    • http://files.tomnoblehomes.com/uploads/1/3/1/3/131398134/gutuj_falonumulinumig_sidiwo.pdf
    • http://files.dawnstastyspoon.com/uploads/1/3/0/9/130968920/bajatutudofa_ponosiv_tonavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/surgeon_simulator_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/63240477374.pdf
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/ace_of_spades_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/57188432007.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/72634117705.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/1719141585.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/learn_german_with_jenny_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7622/files/tezos_baking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/bunchems_instruction_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/taziwitapepuxutasuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/boleride.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/55066422387.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_off00005d6a.bin
dd898fed7b6c3eb990c71ed9c4a34d046dbe5aa0efafaac8f71da2527630420e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6A 5276 bytes
font_01_sfnt_off00006f41.bin
888d136d738a26c7a5c2dcf85a6e1d5b2d54e7833a3d4f95afe1283955d32499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F41 10168 bytes

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