Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fdc6371b362e67…

MALICIOUS

PDF

50.2 KB Created: 2020-08-01 13:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a904707faa820c03b993f65d1c28354a SHA-1: 3edca19037764b21a5afa519e5545e26ec909032 SHA-256: 93fdc6371b362e677bee885a7f27a49e63f4d7f59e754554a1d45defc5bc9a9d
150 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to a critical heuristic firing for a malicious redirector link. The document contains a large number of embedded links, presented as a manual, which point to a redirector service. This service likely leads to further malicious content or exploits. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=crosman+760+pumpmaster+manual
    • http://files.ecologicing.com/uploads/1/3/0/7/130776046/46750abf8.pdf
    • http://files.acorncottagestudio.com/uploads/1/3/1/4/131413678/jufixekoke-bovisubizirojo.pdf
    • http://files.giftedsupportnetwork.org/uploads/1/3/1/4/131453097/4810043.pdf
    • http://files.escape-and-explore.com/uploads/1/3/0/8/130874012/luwinenugenudejamuvo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/437394310.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/rogue_best_in_slot_classic.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/pepozofamimupanibipugij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/38598830677.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/woribomubiwaduno.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/varabekisaruzu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/gotham_font_github.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/95524361294.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6322/files/90023844952.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/walabapofudupelasipabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/31518419337.pdf
    • https://cdn.shopify.com/s/files/1/0433/0654/9406/files/gomasumarodixenurufilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0746/files/sumojarugexoruxesewiremu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009e08.bin
cba2a4dd80e423d11d4413f52d40c2faae31543e04bf8adb2feed9d820076f2c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9E08 18524 bytes
font_00_sfnt_off0000696c.bin
83805a08b4225e5c17cf4cbed52abbb034b2a3509b38cea9fe66b36c6e33e01d
pdf-font-stream PDF embedded font (sfnt) at offset 0x696C 5248 bytes
font_01_sfnt_off00007b25.bin
6cc0952187b218dba2b6e9b2bd733e366bb62d722088d7470aa1eb97c85ee830
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B25 10120 bytes