Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d77898ad377ad93…

MALICIOUS

PDF

37.8 KB Created: 2020-08-05 06:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231943752d5515ea3de11290ec96e323 SHA-1: 08c5ec2e6427df137ebe86f61c68b7501cba278e SHA-256: 3d77898ad377ad93f41c203be3047cc3c4fc2344494d96804068715592245665
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious sites, likely for phishing or malware distribution.

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=mathematical+physics+by+b+d+gupta+pdf
    • http://kubujono.alainnamacpherson.com/uploads/1/3/2/6/132682646/2223808.pdf
    • http://files.vintageprintsandart.com/uploads/1/3/0/8/130873829/6624777.pdf
    • http://files.angelageddes.com/uploads/1/3/1/1/131164152/koxarinin_rerawasivaxipa_terilowij.pdf
    • http://files.laurenmelodyshell.com/uploads/1/3/1/0/131071082/wuxidojidinud-rojod-sosapigeluji-pogemupurojev.pdf
    • http://files.bayareaboatandhomeloans.com/uploads/1/3/1/3/131398059/3302143.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/92028295069.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/95134087929.pdf
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/58186991342.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/destroy_all_humans_ps2_iso.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/molovezotofetigiwajavisut.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/rarux.pdf
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/gamufaxelutabubozedege.pdf
    • https://cdn.shopify.com/s/files/1/0432/3462/3643/files/8187063829.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3170/files/27977541438.pdf
    • https://cdn.shopify.com/s/files/1/0444/3511/2103/files/botany_optional_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/52260568630.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/76649277552.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/4057744073.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_off00005216.bin
4ee29394b77d7c7379a36a3eb4de290733e4f392dfb9c16ddd2253c9dc781607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5216 5720 bytes
font_01_sfnt_off00006585.bin
c34e2ca02b9ddacffd08cb7e45bec83b0d5523963ca961b9a14f24335068d66b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6585 10220 bytes

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