Malicious PDF — malware analysis report

Static analysis result for SHA-256 df811deb180c81b8…

MALICIOUS

PDF

45.9 KB Created: 2020-08-04 06:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d149955b08cd8350a3732f8543c6227f SHA-1: d59ef1b41379aea91caacf512046f6c56b67c356 SHA-256: df811deb180c81b87398745b0f47d60e85e11ae908f2e4d67515a3624bf2377a
152 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a critical heuristic identifying a redirector link to `ttraff.cc`. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. 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=network+marketing+books+in+kannada+pdf
    • http://files.scacademyofauthors.com/uploads/1/3/1/3/131384663/weraxetiwo.pdf
    • http://files.panthercityrugby.com/uploads/1/3/0/7/130775649/dafaj.pdf
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/24_season_1._torrent.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/darusigozixu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/wipimif.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/35086752374.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1464/files/86866046916.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/42280058325.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/5010183410.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/35880168988.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7189/files/gawedofemapikazuluriva.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_off00007420.bin
52b2ae306d08599fbe9ec956b5827c16786223be21da1354b5f3f7c87c472fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 5592 bytes
font_01_sfnt_off00008723.bin
85ecaf2704aec5bebe90d7dac774e9198274ffe1fc48a5089d8f9a9e51aa72e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8723 10512 bytes

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