Malicious PDF — malware analysis report

Static analysis result for SHA-256 34875f29e5f0bbc7…

MALICIOUS

PDF

45.1 KB Created: 2020-08-10 20:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231ce6fb9c9bf065a56522097cb33200 SHA-1: b867c1bafb30c8d560f7dbbc8b7787c68e1025c0 SHA-256: 34875f29e5f0bbc7bba34d82e128bf655e58615cec45ec0aa20f250e8ca5934d
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or SEO manipulation scheme, evidenced by the PDF_SEO_LINK_FARM heuristic firing and the presence of numerous embedded URLs. One critical URL, https://ttraff.com/pify?keyword=supplementary+material+pdf, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains many of the extracted URLs, suggesting a primary function of directing users to external content, potentially malicious.

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=supplementary+material+pdf
    • http://files.thedecalshopcanada.com/uploads/1/3/1/4/131437411/0792cb2e35.pdf
    • http://kegusare.flotography.org/uploads/1/3/1/3/131383483/5da3c.pdf
    • http://files.buypolarxtracts.com/uploads/1/3/1/3/131398117/217852.pdf
    • http://toxebamib.loganloves.org/uploads/1/3/0/7/130739777/jizijagufovifiwumi.pdf
    • http://files.mayflowerofbillings.com/uploads/1/3/1/4/131452817/matuja_xufavubujufux_dopakakulugimin_nurudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52299098946.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65788935473.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/niwoxiwakowugen.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/29920269658.pdf
    • https://cdn.shopify.com/s/files/1/0435/4683/7151/files/adjectives_ed_o_ing_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/welikinudujamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/anaphylactic_shock_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0430/9005/1221/files/videkero.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/blender_rotate_around_object.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/ridiborizozuwibexute.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.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_off00006ab9.bin
8a38f1f4e60b4d58540a49b152726a0b0106fe5cf533872be3c3c55f315d24e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB9 5216 bytes
font_01_sfnt_off00007c6d.bin
42f20eb8e17f1a2f2921678f8a3b0d053ec79fd40d03cf127f4f757981a8696a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 13500 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.