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) First seen: 2026-05-09
MD5: c387774c394234fd5e1353af2c9807cc SHA-1: 523b47453be0dd50b031ca6009b884e0743877ad SHA-256: ea5b8cfc96305febbb5fd280fc3040db2a675e2f10f61e556608e03ec7a80617
194 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 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=online+lab+reports+dow In PDF document text
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdfIn PDF document text
    • http://regamevi.ellyx.studio/uploads/1/3/1/6/131606727/pugasosojir_zopologovob_pesivugowaru.pdfIn PDF document text
    • http://files.mccv2015.org/uploads/1/3/1/4/131406437/gepozasoxiwo_milajiwuxejum.pdfIn PDF document text
    • http://zorumot.yrpm.ca/uploads/1/3/0/7/130775565/763de2.pdfIn PDF document text
    • http://files.jacwicksdesigns.co.uk/uploads/1/3/1/4/131454620/267546.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jerozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/lebazomubugetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/67518423602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5950/3519/files/66387127814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/xixulitokagono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/xijigozefotidivowixalelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/robert_bosch_automotive_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/call_of_duty_psp_100mb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9001/6424/files/dubai_international_airport_terminal_3_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6195/4971/files/46167014334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4868/8033/files/lasciatemi_cantare_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/capites_de_areia_livro_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC828 2828 bytes
SHA-256: dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
font_01_sfnt_off0000d222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD222 5212 bytes
SHA-256: 91db4c5ef2c70c89ca964c07958f5242e437daae81a45741512b3ae1382fb608
font_02_sfnt_off0000e3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 10764 bytes
SHA-256: 43732afce1ccb4f8dcf9d8325f58fc681f3fc45ada776995baca433d38a0becb