Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff15699674bd98c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-26 15:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dacdb98deab0ebcae8a6a1f396bb37e5 SHA-1: 04724ee0bebbe5375b48411e6df7c60e02f1f492 SHA-256: aff15699674bd98cdcd53b28a37a7e226a5df19adbf0daa981780275818b28a5
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for free PDF content, which is a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

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=guide+to+your+best+body+kris+gethin+pdf+free
    • http://miponegev.josemartinilaoedtechinternship.com/uploads/1/3/0/7/130738850/gakikunobek.pdf
    • http://files.usedmufflermachinery.com/uploads/1/3/1/4/131455475/3709586.pdf
    • http://files.radomirtodorov.com/uploads/1/3/1/6/131606984/garokof.pdf
    • http://files.indianaturtlecare.com/uploads/1/3/1/4/131410370/9565658.pdf
    • http://files.greaterhudson.org/uploads/1/3/1/4/131438420/mabebefixilemi_nibavoxopelaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/flight_simulator_x_mods.pdf
    • https://cdn.shopify.com/s/files/1/0447/1724/4570/files/cd_root_permission_denied_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/aroma_digital_rice_cooker_arc-_914d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/fozegijasala.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/dinepufenoluvowunavupo.pdf
    • https://cdn.shopify.com/s/files/1/0458/1693/8662/files/58802928832.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66923604261.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/fasexixosofimenep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/bokope.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/24400025482.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_off00005d0b.bin
2836a193c0e7f419da121d40506de2cca9c06d28306ee6cda53b12e701298966
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0B 5400 bytes
font_01_sfnt_off00006f68.bin
226ae5653e6986459d5b4ea3070520f61b7d8692e1b5665acf06a71952536874
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F68 10012 bytes