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)
MD5: 15d5dafc32d745870cead0cd1500a1a6 SHA-1: 0392dc71733c5273ba101ae2159b60d89e962a28 SHA-256: cb99c6d242744ff74e2d4fd43902e6b063f2d88302f6674470e59decb5743dca
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=work+rules+laszlo+bock+pdf+free. The document body also contains this URL, suggesting a lure to trick users into clicking it. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://gaseg.detailprosmobile.com/uploads/1/3/2/8/132814930/2705788.pdf
    • http://files.graywolfpestcontrol.ca/uploads/1/3/0/7/130740257/gujugowaxezugoxigav.pdf
    • http://files.sweetbabiesdayhome.com/uploads/1/3/2/7/132740320/zipud_wenuv_soraminudej.pdf
    • http://files.mistynielsenphotography.com/uploads/1/3/1/8/131872298/vuzevefabajivu-lamedilajuza-fuporoke.pdf
    • http://files.uncommongroundsmobilecafe.com/uploads/1/3/0/7/130776183/2875893.pdf
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/lonuzipepazexisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1942/files/63059482464.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/rimaza.pdf
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/betovaxawaviremejati.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/25712803671.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/53711674802.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/poxosizuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/87504674409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/wigoritim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/burger_king_coupons_2020_mrz.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1139/files/govudowaxelukujutegivajog.pdf
    • https://cdn.shopify.com/s/files/1/0439/8225/8334/files/20226573760.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/3680057146.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
stream_006_off0000a2f0.bin
8640ea7129e0dff5336ce9f984338a16a2ae249f7c4796383375a93336542b9d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA2F0 17976 bytes
font_00_sfnt_off00006c2b.bin
9fb7e88cfd2aea9500f6be713c09c77bf84deeec047b53b99aafcfaad1b359fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2B 5416 bytes
font_01_sfnt_off00007eb9.bin
fddf59e3cd63ba881a89971da0097fe9ecbcf9989cb4baf5661b5dcf0eea1a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB9 10544 bytes

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