Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea2b6c081766908…

MALICIOUS

PDF

45.2 KB Created: 2020-08-10 00:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09183673061d48896485a546b9bf3e3a SHA-1: 8b80ebc30e220e16c241424ae15673b6cadef627 SHA-256: 8ea2b6c0817669085a484b7fd0e9aedb8868aa83d660e98967b2ae2003714e33
152 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded URLs, including one pointing to a known malicious redirector at 'ttraff.com'. The heuristic firings indicate this is a link farm designed to redirect users to potentially harmful content. The document body itself is largely unreadable binary data, but the presence of numerous external links suggests a social engineering attempt to lure users to malicious sites.

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=optical+nanosensors+pdf
    • http://files.physicalmindco.com/uploads/1/3/0/7/130738548/nerupekoletudelo.pdf
    • http://files.myelinationmriatlas.com/uploads/1/3/1/1/131164462/8c1b30b413aa4d9.pdf
    • http://files.goingalloutfitness.co.uk/uploads/1/3/1/8/131872298/3889812.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/xanuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/nusunoripa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0440/files/33503531447.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/89332332033.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62386903812.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/five_characteristics_of_an_entrepreneur.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/gumipibi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8920/files/arduino_tutorial_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/4000/6559/files/38115306819.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/22614622886.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/12675769763.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/23273989455.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007296.bin
bf0ac99f990d77007c84d851296386611e2637f72e96f920c9386484e02b2570
pdf-font-stream PDF embedded font (sfnt) at offset 0x7296 5176 bytes
font_01_sfnt_off0000843b.bin
4de367048a8dc566f2aae86af3f20c9e5b1d72e6842fbc8c1a41887d47ecd500
pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 10448 bytes