Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42361d4b817d2ab…

MALICIOUS

PDF

43.8 KB Created: 2020-08-04 21:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b84cd9896081329fdf0671644c9b947 SHA-1: 994ba8eb2d2ebc51297b21f0b3b3a7c5c77b72f3 SHA-256: e42361d4b817d2abbd3cd391c787654521afd860e8953d5a1a1b3363e77bade1
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. The document body, though heavily obfuscated, contains the text "wing chun pdf techniques" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other links to Shopify domains, while individually benign, contributes to a link farm heuristic, indicating a broader attempt at SEO manipulation or traffic generation for malicious purposes.

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=wing+chun+pdf+techniques
    • http://files.starlightdancecamps.com/uploads/1/3/0/7/130775970/1b4c393.pdf
    • http://files.strategic-concepts.com/uploads/1/3/1/3/131384127/tekifozage_lotizakile_rajuxuvatakow_memulabad.pdf
    • http://files.suzyharrisdesign.com/uploads/1/3/2/6/132681308/jeligabitino.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/juzizexupebopuvadipoxunuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/24710771111.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/98512094864.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/gulukovisebewegulijimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mefawubizujoki.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/tenor_banjo_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/12575775622.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/76642817097.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7831/files/6231921451.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4942/files/nagowawaputixiradapux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/58052221559.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/nddot_road_conditions_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/7362/5500/files/pumped_up_kicks_bass_tab.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_off00006dc0.bin
ad79c266146e29254fca2cdd0669d6612f4f835b74466941f3bff42d3edea3db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 5220 bytes
font_01_sfnt_off00007f9b.bin
bbafcb6b3f1f1e8176b8e602eae0fc9ac3276940136658d3fa4be755a3496aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9B 10012 bytes