Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfaa6e8e5c70eee…

MALICIOUS

PDF

46.7 KB Created: 2020-08-20 02:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ea7711953ed2e5c6e27f8c52e92c4e SHA-1: b8b1ba219f9247421da3b8ebbd98f8897d9e3497 SHA-256: 3bfaa6e8e5c70eee38a54e8c54cb58479c6861aab2c69399d25cb6456ad2a51e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious intent to redirect users to harmful 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=chamelephon+apk+2019
    • http://files.trippbibleinstitute.com/uploads/1/3/2/6/132681586/b4921d6ccc6b5.pdf
    • http://nuwuze.maydaymayhemphotography.com/uploads/1/3/2/3/132303117/930550.pdf
    • http://tasiw.erikgjesfjeld.net/uploads/1/3/0/8/130874493/pekoralud-semumutofeju-monalopita-ruxiwugek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6672/files/asbestos_cement_sheet_manufacturers_in_coimbatore.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/woredabesivotov.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/dijuporodeviros.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/53654675491.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/air_breathing_engines.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/jelikazilugeminezizabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3413/files/98336234608.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/pair_bluetooth_headphones_with_sony_android_tv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/ketogid.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/wiforoxumunixovimowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5346/5243/files/bobcat_s130_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0440/7332/0600/files/81766345981.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/blended_learning_in_higher_education.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8376/files/fowizipokipotebilumaweb.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_off00007851.bin
bb9aa32eda66c6be7b2921d2c10462d94c5cea7afe189b76d14f17b9f485c84c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7851 5236 bytes
font_01_sfnt_off00008a07.bin
ebd7be2add49e38d5d5435048a00b2c18471042512c51adaaf591b37df563ac0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 10448 bytes