Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94a8ce5ec005856…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 01:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5c6f9d723d711c45070421a309f9772 SHA-1: e1ef73e388aff31adc2c1efc3b43542adc46c90a SHA-256: c94a8ce5ec0058569eeb6b198b7846176eda17c77b5d167dc534a97938727f4f
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to legal forms and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=process+server+affidavit+of+service+form+florida, which is likely used for phishing or to redirect to further malicious content.

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/pify?keyword=process+server+affidavit+of+service+form+florida
    • http://files.newtonwoodcraft.com/uploads/1/3/1/1/131164153/xijugawebiwulafatoj.pdf
    • http://files.andrew-bailes.com/uploads/1/3/1/1/131164314/7564a2cc2f4ea.pdf
    • http://tokusowa.remycenard.com/uploads/1/3/2/8/132814930/6fe029f5.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/56457602043.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/export_from_inkscape.pdf
    • https://cdn.shopify.com/s/files/1/0433/6343/4654/files/vegirevopovadefetuviwi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/finite_mathematics_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/vutidusi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/arema_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/fesafomen.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/24440177230.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/trap_the_soul_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/baroliwamedavinowofewet.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/zuruwanolafure.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/bebetutatosinerujiw.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_off000061cf.bin
a6974de3a3a1bc9051977d8072c26635717ea920e5d4d2a5b37dd7f36bf610de
pdf-font-stream PDF embedded font (sfnt) at offset 0x61CF 5228 bytes
font_01_sfnt_off0000737a.bin
1ed692f6e8aa742cde49ea64e84b8734cf1efd4d3a29d2b989df5508a0a42899
pdf-font-stream PDF embedded font (sfnt) at offset 0x737A 9692 bytes