Malicious PDF — malware analysis report

Static analysis result for SHA-256 271f3655feffc282…

MALICIOUS

PDF

34.5 KB Created: 2020-08-31 08:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68c7db26eafc24bd2daabc65e232f001 SHA-1: ee163b50bb5270683a16e927785e51559e4261e4 SHA-256: 271f3655feffc282141c75dd03b2f9f27e7354cc89a5248681d3ee6996ee8044
140 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically pointing to a URL designed to lure users into downloading an APK. The document body and extracted URLs reinforce this, showing a clear attempt to trick users into downloading 'Subway Surfers Paris APK' via a redirector. The presence of a large number of external PDF links also suggests a link farm, likely for SEO poisoning to increase visibility of the malicious download lure.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wix?keyword=subway+surfers+paris+apk+download
    • https://static.usrfiles.com/ugd/a91264_96c4ce3b237446fc82a75b2b88cf4b09.pdf
    • https://static.usrfiles.com/ugd/f09a9d_b747fd3e791e465aad826939039da9e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_78e42a642473420a83e2b783dc661558.pdf
    • https://static.usrfiles.com/ugd/18f527_87ac9a012c004ef18da265a285cd448f.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/22318633839.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/calculus_and_analytic_geometry_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/865895945.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/kijufidawaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/jimisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/mapewujusinolivokekujodi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/28139647201.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/woloriwuxake.pdf
    • https://cdn.shopify.com/s/files/1/0433/6127/1959/files/sleep_apnea_patient_education.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/bareliviriwux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6944/8097/files/25056294118.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/9435087307.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/tiwixezeker.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_off00004739.bin
ca82ab68a4951f2981547ddd4780db1f776cb12cd339db938a7f5d53920c5bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4739 5536 bytes
font_01_sfnt_off00005a2e.bin
f265e65f44f47074d37dab41149744c904802a7cf8581e33a8be8ab38f196526
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2E 10272 bytes