Malicious PDF — malware analysis report

Static analysis result for SHA-256 f135906dc8a49adb…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 05:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb71cee1535895437706698d978f9b97 SHA-1: 4d40618339007377cb5f3a773b7c1782ff193572 SHA-256: f135906dc8a49adb805946bad35284ea08f250540f37ea45e2c5bae9199a2dfe
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a title and numerous embedded URLs, including a suspicious redirector URL, which are likely intended to lure users to malicious sites. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malware through numerous compromised or controlled sites.

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.ru/pify?keyword=the+bye+bye+man+parents+guide
    • http://gadepit.njhfoundation.org/uploads/1/3/0/7/130776499/mirixipe_texonubi_kulidufem_vivasupov.pdf
    • http://files.leedsmiddleschoolband.com/uploads/1/3/0/8/130814605/7908566.pdf
    • http://files.yogacycles.com/uploads/1/3/2/7/132740595/260060.pdf
    • http://files.whereyoumake.com/uploads/1/3/2/7/132741571/zilazud.pdf
    • https://cdn.shopify.com/s/files/1/0437/3636/7265/files/26946342006.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/15439156686.pdf
    • https://cdn.shopify.com/s/files/1/0448/1371/3570/files/asidosis_respiratorik.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/best_ps2_emulator_for_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/sesizusataxil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/84971124220.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/dowuvapipebejo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/58339336630.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3658/files/55597239127.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_off00005ffe.bin
d1bbb525eb660755d95a531937cf33cfa96542078fc275909397d80f285f4920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 5532 bytes
font_01_sfnt_off000072a6.bin
984e5944338035a10738d3d6ef1718cf8a0a20aef762356648a703fd8e13e51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 10604 bytes

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