Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5b8cfc96305feb…

MALICIOUS

PDF

69.8 KB Created: 2020-08-19 19:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c387774c394234fd5e1353af2c9807cc SHA-1: 523b47453be0dd50b031ca6009b884e0743877ad SHA-256: ea5b8cfc96305febbb5fd280fc3040db2a675e2f10f61e556608e03ec7a80617
150 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 external PDF files hosted on various domains, creating a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=online+lab+reports+dow', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'online lab reports', suggesting a lure to trick users into clicking the malicious links. The ML classifier also strongly indicated maliciousness.

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=online+lab+reports+dow
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdf
    • http://regamevi.ellyx.studio/uploads/1/3/1/6/131606727/pugasosojir_zopologovob_pesivugowaru.pdf
    • http://files.mccv2015.org/uploads/1/3/1/4/131406437/gepozasoxiwo_milajiwuxejum.pdf
    • http://zorumot.yrpm.ca/uploads/1/3/0/7/130775565/763de2.pdf
    • http://files.jacwicksdesigns.co.uk/uploads/1/3/1/4/131454620/267546.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/lebazomubugetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/67518423602.pdf
    • https://cdn.shopify.com/s/files/1/0429/5950/3519/files/66387127814.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/xixulitokagono.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/xijigozefotidivowixalelu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/robert_bosch_automotive_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/call_of_duty_psp_100mb.pdf
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/dubai_international_airport_terminal_3_map.pdf
    • https://cdn.shopify.com/s/files/1/0453/6195/4971/files/46167014334.pdf
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/lasciatemi_cantare_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/capites_de_areia_livro_download.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_off0000c828.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
pdf-font-stream PDF embedded font (sfnt) at offset 0xC828 2828 bytes
font_01_sfnt_off0000d222.bin
91db4c5ef2c70c89ca964c07958f5242e437daae81a45741512b3ae1382fb608
pdf-font-stream PDF embedded font (sfnt) at offset 0xD222 5212 bytes
font_02_sfnt_off0000e3ea.bin
43732afce1ccb4f8dcf9d8325f58fc681f3fc45ada776995baca433d38a0becb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 10764 bytes