Malicious PDF — malware analysis report

Static analysis result for SHA-256 274b1d33c7b32065…

MALICIOUS

PDF

57.1 KB Created: 2020-08-08 02:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a169359e922f8f9caab8f58143187e38 SHA-1: bae9911edec8b0290f6d6db335df61bc5160980f SHA-256: 274b1d33c7b320658fc1d00435c374ccfa083360900a9d3be834beb73354b5b5
150 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a primary redirector URL identified as malicious. The document body, though partially garbled, contains text suggesting it is a book PDF, a common lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a probable attempt to drive traffic to malicious sites or distribute further payloads.

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=eduard+pernkopf+book+pdf
    • http://files.darkfableminiatures.com/uploads/1/3/1/4/131482931/wesanoxovor.pdf
    • http://files.blackberrycreek.org/uploads/1/3/0/8/130813837/veletigowek-pefigojinosifim-zafokozeve.pdf
    • http://jebujisi.meganartandphoto.com/uploads/1/3/1/4/131409200/wozimet.pdf
    • http://files.tejeshpradhan.com/uploads/1/3/1/3/131398019/fb62b.pdf
    • http://files.atomicnature.org/uploads/1/3/2/6/132682778/5c163b.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/41800176464.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/74498871063.pdf
    • https://cdn.shopify.com/s/files/1/0431/0407/5933/files/dododevefexugoxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/keketokogulujamafawo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/chief_keef_emojis_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/nimes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/29859931607.pdf
    • https://cdn.shopify.com/s/files/1/0432/2829/9427/files/pomejapatoga.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/77945998824.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/vebavibotokiwesafelugex.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/mutagoziwidunupasafelan.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/introductory_stories_for_reproduction_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/rawinakujadowavorudik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/velew.pdf
    • https://cdn.shopify.com/s/files/1/0434/1019/4582/files/blacksad_juego_de_rol_descargar.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_off0000bd0b.bin
496cbf204c38d00248eb03611f743bb5cbe8437d7a7195304baaf21819bddb1f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBD0B 17540 bytes
font_00_sfnt_off000088d6.bin
4c8cceb1d262b07c65ce721ad54586ae39586e61b04a0611e6f06e81d8d124fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 4984 bytes
font_01_sfnt_off000099da.bin
1079ca7f05ac3f9cb8c99e100e0a6c40e4ac09c41be394f6515f9980223c71f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x99DA 10220 bytes