Malicious PDF — malware analysis report

Static analysis result for SHA-256 caaaac17f1d40695…

MALICIOUS

PDF

32.7 KB Created: 2020-08-25 11:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5883a8ab2c703d8547f1464e56f2761 SHA-1: 3510bd43a7ec99fe8b325b51c072e30fbcf25d4d SHA-256: caaaac17f1d4069579ec911ebed90c80b461d0a8629027ee5e0150aeb0323261
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.com/pify?keyword=adowa+gospel+s' is identified as a malicious redirector. While many other links point to benign Shopify domains, the presence of the malicious redirector and the sheer volume of links suggest an attempt to lure users to malicious content.

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=adowa+gospel+s
    • http://rumimalo.gnosisadelaide.com/uploads/1/3/1/4/131437423/6236099.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/afterburn_aftershock_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/10_day_weather_forecast_lincoln_ne.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/bestimmter_unbestimmter_artikel_deutsch_bungen.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/biarritz_olympique_rugby_centre_de_formation.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/52287856884.pdf
    • https://cdn.shopify.com/s/files/1/0460/8701/2516/files/59112909494.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/kupewizuwedaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4743/files/naluk.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_off000043b1.bin
3406ef95a92b1ec245cce956bfd051650cd47f0313c2db462c66af3ebdc830ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43B1 5112 bytes
font_01_sfnt_off00005542.bin
fd1b5b646dd5e7810adb2ff838c5e305b097a94d5c6b1c87901f26cb98482ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5542 9876 bytes

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