Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf90a5fd4a309af…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 08:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a38f664eb29af070d9843eb40d0f6c4d SHA-1: a5b55999410bb24fd99b85957f12ba9d6ed51402 SHA-256: dbf90a5fd4a309af032023ebfe530d14fe6c9ab70608d432ef9c8c827ec11aa5
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of an SEO link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=capture+one+pro++size, which is likely used to redirect users to further malicious content. The document body contains text related to 'Capture one pro size' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to download or interact with potentially harmful software.

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.ru/pify?keyword=capture+one+pro++size
    • http://koxewol.bodypercussionclassroom.com/uploads/1/3/2/3/132303079/xonawegope.pdf
    • http://files.gaitwaychiropractic.com/uploads/1/3/0/7/130776490/253680.pdf
    • http://files.carlsingletoneconomics.com/uploads/1/3/2/6/132681670/zabijebibaf_vulonazegiwazu_doxefop_fuwabagodejo.pdf
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/69255326854.pdf
    • https://cdn.shopify.com/s/files/1/0438/6449/0149/files/bunny_kingdom_in_the_sky_rules.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6471/files/11344871887.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/6580955374.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/ar_android_camera_app.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/21553462642.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/cbse_sample_papers_for_class_10_2020_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0462/0088/1315/files/nodofuxunexediganewume.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/6644711421.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/52180695239.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_off00006c52.bin
cdc1de6ca50e2fd92c842c5fdc61f6d8aaba28d7ef69d83d794f5165cc7072f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 4736 bytes
font_01_sfnt_off00007c83.bin
7881ae0c8ab0f01b2265c1eae1f9fa16b0d06f9bb0ce67915a1ae5454ffd68cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 10628 bytes