Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f4460cc4a81327…

MALICIOUS

PDF

57.5 KB Created: 2020-08-13 21:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7c069e7d108921958971627df71a8df SHA-1: 03a912f844ddb958f64093c1516eed39e2754eb2 SHA-256: 23f4460cc4a8132783a8aaad491ffcd3e2b6c76b5e22e529070a2f5dead103df
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting a lure for an 'Accusoft barcode scanner apk'. The PDF also contains a mass external link farm, with the primary redirector URL being https://ttraff.cc/pify?keyword=accusoft+barcode+scanner+apk. This suggests the document's primary purpose is to redirect 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.cc/pify?keyword=accusoft+barcode+scanner+apk
    • http://kogunude.heirloomtattoo.com/uploads/1/3/1/6/131606122/bokawibevopomat-dirijexivaseba-kimokin.pdf
    • http://files.bethgagliardi.com/uploads/1/3/2/6/132695531/955d64.pdf
    • http://zuwuvak.lorigphotography.net/uploads/1/3/0/8/130874043/jojekadisuw.pdf
    • http://tugogan.luxelashesbyliz.co/uploads/1/3/1/3/131379578/zigukudekemat_wekuwi.pdf
    • http://files.cineforgemedia.com/uploads/1/3/1/4/131438443/rekelelivage.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/folow.pdf
    • https://cdn.shopify.com/s/files/1/0448/3937/0909/files/cancionero_para_guitarra_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/fatilexepinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mizamolapo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4482/1409/files/good_faith_marriage_affidavit_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0448/9897/5899/files/american_english_file_2_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/lamegipomafuko.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/catalan_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/farixikedowijek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a74d.bin
54490b1c48c52204ae124d69d2c0fa187e5a4ef2cae01e10eefbd71634438e67
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA74D 27868 bytes
font_00_sfnt_off000072bb.bin
8b7f0ae4fe546f63e76d883645a8343e0a6a12f83da08b8b151e04f3a1ba2918
pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 5308 bytes
font_01_sfnt_off000084d1.bin
454b8888ddf4b30460eddecd0aa7a30dfec1d33c534ceed9090d10c1aed27bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D1 10344 bytes