Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb99c6d242744ff7…

MALICIOUS

PDF

51.1 KB Created: 2020-08-10 01:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15d5dafc32d745870cead0cd1500a1a6 SHA-1: 0392dc71733c5273ba101ae2159b60d89e962a28 SHA-256: cb99c6d242744ff74e2d4fd43902e6b063f2d88302f6674470e59decb5743dca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body text, though partially obfuscated, includes the same redirector URL, suggesting a phishing or scam lure. 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.com/pify?keyword=work+rules+laszlo+bock+pdf+free In PDF document text
    • http://gaseg.detailprosmobile.com/uploads/1/3/2/8/132814930/2705788.pdfIn PDF document text
    • http://files.graywolfpestcontrol.ca/uploads/1/3/0/7/130740257/gujugowaxezugoxigav.pdfIn PDF document text
    • http://files.sweetbabiesdayhome.com/uploads/1/3/2/7/132740320/zipud_wenuv_soraminudej.pdfIn PDF document text
    • http://files.mistynielsenphotography.com/uploads/1/3/1/8/131872298/vuzevefabajivu-lamedilajuza-fuporoke.pdfIn PDF document text
    • http://files.uncommongroundsmobilecafe.com/uploads/1/3/0/7/130776183/2875893.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/1/0432/5477/5970/files/lonuzipepazexisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7808/1942/files/63059482464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/rimaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/betovaxawaviremejati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/25712803671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/53711674802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/poxosizuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/87504674409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/wigoritim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/burger_king_coupons_2020_mrz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8003/1139/files/govudowaxelukujutegivajog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/20226573760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/3680057146.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a2f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA2F0 17976 bytes
SHA-256: 8640ea7129e0dff5336ce9f984338a16a2ae249f7c4796383375a93336542b9d
font_00_sfnt_off00006c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2B 5416 bytes
SHA-256: 9fb7e88cfd2aea9500f6be713c09c77bf84deeec047b53b99aafcfaad1b359fa
font_01_sfnt_off00007eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB9 10544 bytes
SHA-256: fddf59e3cd63ba881a89971da0097fe9ecbcf9989cb4baf5661b5dcf0eea1a56