Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0617f1116e8750…

MALICIOUS

PDF

55.1 KB Created: 2020-08-13 19:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1181e8d0517d366e454058ae1e4c0644 SHA-1: 8d5c87cc8b31a5ddd7472214865c1396d9c469b8 SHA-256: ea0617f1116e8750df6f17c8b6a9552cd0916a1a57a9669d856469e7163e67fd
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to shopify.com domains but also include several unknown reputation URLs. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious link within the document.

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.cc/wb?keyword=documentary%20evidence%20notes%20pdf
    • http://buwix.banahawhealsspa.com/uploads/1/3/0/7/130776791/9c9865769.pdf
    • http://files.dianastoic.com/uploads/1/3/2/6/132696113/futepudi.pdf
    • http://files.bestecomerce.com/uploads/1/3/0/7/130775431/3897297.pdf
    • http://vexar.threedomsolutions.co.uk/uploads/1/3/1/4/131406709/ludadu.pdf
    • http://fexil.shannonecameron.com/uploads/1/3/2/6/132683071/1342589.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/fumibatinazug.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/rawaxukirigifaremofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/gidefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/54476412106.pdf
    • https://cdn.shopify.com/s/files/1/0436/7994/0761/files/inspirational_quotes_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/46586631652.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9888/files/fuwegitonememajovuxiwuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/zozozejoxakemabuduwulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/alternator_function.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/78952710046.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/98339682390.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5712/files/consumers_buying_behaviour.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/riwerolukivurodarexato.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_off000097df.bin
ed053a2241602a76d0f3fff59c46025ba3f6b2f908ba11da3e5ad007f099bf6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97DF 5432 bytes
font_01_sfnt_off0000aa53.bin
8d1171f71e612c888d32d0d9cc3103f84a0558c3fdb44009041371eba081391e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA53 10772 bytes

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