Malicious PDF — malware analysis report

Static analysis result for SHA-256 20345cbd5d3d75cd…

MALICIOUS

PDF

41.3 KB Created: 2020-08-25 23:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda30cd27d507119695a836ba0f5249e SHA-1: f8d9a9b88a2e211f96297923dab3f70e9c820418 SHA-256: 20345cbd5d3d75cde8d2bf452b98f09fe9b83eec4feb5b6c83d24aa7cc370dbe
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify, but one prominent link directs to a malicious redirector at 'ttraff.com'. The document body text, though heavily obfuscated, contains the phrase 'Behold the dreamers themes' which appears to be a lure for the malicious link. The presence of a malicious redirector suggests the PDF is intended to lead the user to a site that will likely host further malware or phishing 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=behold+the+dreamers+themes
    • http://dejofun.firstchristianiowafalls.org/uploads/1/3/1/3/131383483/b0893.pdf
    • http://zerepe.cdisbell.online/uploads/1/3/0/8/130874211/49035a8a70.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/fusexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/61012037977.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/62281251703.pdf
    • https://cdn.shopify.com/s/files/1/0462/4131/7015/files/urinary_tract_infection_treatment_guidelines_australia.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/thinking_out_loud_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/31095765448.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/bansuri_flute_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4631/files/perfect_by_sara_shepard.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/63581066349.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2394/files/50725603864.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/mmrc_breathlessness_scale.pdf
    • https://cdn.shopify.com/s/files/1/0435/6676/0095/files/sutenepipigatatoxofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/48680079533.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/duwiwixapof.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_off000065bd.bin
9403356d254b8c0384e4af3ff9146d385d48a7ac2d031174e539662770f3fce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5112 bytes
font_01_sfnt_off000076f3.bin
c85ce41b9ff86a842d87a2cebeb7619325d951c00dc80cb9d117d2ec44c261b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 9844 bytes

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