Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38a80aa4001a750…

MALICIOUS

PDF

45.3 KB Created: 2020-08-18 18:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba70a87e17e64ac5066994330a1c296b SHA-1: 391fda487717ffabeb84e105cbc4e91bf91ed494 SHA-256: e38a80aa4001a7505316d4e6379cdaba7d7b79c6d79e2b0944ed541aa1d79d1b
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious link, "https://ttraff.cc/pify?keyword=what+does+asbestos+cement+sheeting+look+like", is presented as a search result, likely to trick users into clicking it. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to the link farm.

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=what+does+asbestos+cement+sheeting+look+like In PDF document text
    • http://mamekena.sistereducator.com/uploads/1/3/2/8/132814930/8968930.pdfIn PDF document text
    • http://files.rollingforkorganicfarm.com/uploads/1/3/1/3/131383651/latinugo_ridesagem_memumuxolulujij.pdfIn PDF document text
    • http://files.sabatinomangini.com/uploads/1/3/0/8/130874042/bisevan.pdfIn PDF document text
    • http://vepuz.brentwoodpetresort.net/uploads/1/3/1/3/131398473/a8d3215dc.pdfIn PDF document text
    • http://benogaza.yakimatietonirrigation.com/uploads/1/3/1/4/131483083/2989895.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/1/0430/7173/3917/files/70231427808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/1998_ashrae_refrigeration_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/minimize_file_size_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/xidepaputidazipivulusetum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/radibijuzojira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/zifaxunajazolaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/xowenolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/chest_anticoagulation_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/28148658099.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 5476 bytes
SHA-256: a5ea419aa6750fd97fc0d45968700c316a9361fb8f08a0a8244fb90aa11beba6
font_01_sfnt_off00007b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 14300 bytes
SHA-256: 8fdf0ac83c624de0c06898fe198893f86735b140b3fc1ca4021f4d1a8ac59b7c

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