Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba97fa6a0c670b4…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 22:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e915fd9d18ca0e92bded3579d5a58bb SHA-1: ea2714d48f1c79a6e2dea3e58a0ee945487d47e8 SHA-256: 3ba97fa6a0c670b473659937abb7596c69e5362dbf84cbf2d2362c7df593eb40
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body also explicitly contains the URL and a lure related to 'webgenie swf player apk'. The presence of numerous benign Shopify links suggests a link farm or SEO poisoning technique to mask the malicious URL. No scripts were extracted from this sample.

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.club/wix?keyword=webgenie+swf+player+apk
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/sociology_anthony_giddens_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/general_accounting_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/tuwipibawivasude.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/mexexugejaxaliru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/64738773941.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/71499221904.pdf
    • https://cdn.shopify.com/s/files/1/0437/6693/9799/files/41945044078.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/genoluponorapisetesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/barefoot_in_the_park_full_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/alone_picture_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/avast_antivirus_free_pc.pdf
    • https://cdn.shopify.com/s/files/1/0440/4055/2598/files/block_breaker_deluxe_2_java_game.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.pdf
    • https://static.usrfiles.com/ugd/b58d21_7361a56f98e24d0bada06aafd77c6c13.pdf
    • https://static.usrfiles.com/ugd/60933b_926256ca2fb8483cb6831976136ec9e1.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
font_00_sfnt_off00005330.bin
ba83fbfb01f7f0f8643fd34630b76d5a4a98ae5cfcc34ee09e26a61f36578314
pdf-font-stream PDF embedded font (sfnt) at offset 0x5330 5480 bytes
font_01_sfnt_off00006609.bin
33fb0f5d727a24ef02545d9adfd1a15fd08fadd23405227ac0d1cdb4cfd1d2f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6609 10452 bytes
font_02_sfnt_off00008a1b.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1B 16092 bytes