Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db9f50bfd051c31…

MALICIOUS

PDF

47.8 KB Created: 2020-08-12 16:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36e07bef61aeced992892dfed5137a73 SHA-1: 9bfe12357ac0b1ba5cfdb62a2681ec25f8abdf8c SHA-256: 8db9f50bfd051c3162b753b8e70b98b320ce48c6ab03bca363fd2caeafbd88a9
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link https://ttraff.cc/pify?keyword=anaerobic+digestion+process+steps+pdf leads to known malicious infrastructure. The 'PDF_SEO_LINK_FARM' heuristic further suggests a large collection of external links, many hosted on Shopify, likely designed to obscure the malicious intent and distribute malware or phish users. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=anaerobic+digestion+process+steps+pdf
    • http://files.dsanorthstar.org/uploads/1/3/0/9/130969709/9026856.pdf
    • http://ledap.northernlightsoperations.com/uploads/1/3/0/8/130874431/tojoze.pdf
    • http://files.scifihistory.net/uploads/1/3/0/8/130874095/4590676.pdf
    • http://files.discover-davao.com/uploads/1/3/2/6/132681658/zugen_vafuxanop_gibug.pdf
    • http://files.shoesforstudents.com/uploads/1/3/0/8/130873949/6d782e2f.pdf
    • https://cdn.shopify.com/s/files/1/0440/4799/0934/files/19098864052.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/98529986527.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/10541944962.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/40810408779.pdf
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/61907456208.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/banting_diet_plan_for_weight_loss.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/attarintiki_daredi_songs_lyrics_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/xatevedebotegukepubej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/xumugusover.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/lulejirokesunobaremoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/2004_jeep_liberty_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/79134990562.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
font_00_sfnt_off00006fcd.bin
9ded15d5e1353b8ef76f5d06c942513e613f9dd923fa4f4f6b067b2b741a97ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 5208 bytes
font_01_sfnt_off00008187.bin
5175eda6bd6fb11d170d62b2d2f22b64dadb58b78250c96ab7b9ce72cd11b6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8187 9976 bytes
font_02_sfnt_off0000a380.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA380 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.