Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e9700c3a3fcc32…

MALICIOUS

PDF

39.8 KB Created: 2020-08-28 05:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e044c3940fd8f04343c5820a92b40a74 SHA-1: a42a8524a9e74ce0db2445aa6e8ca74250b21ff4 SHA-256: b0e9700c3a3fcc3284f408f59bc07da4d74bc4e65977670fb9dc8bfb09046e10
154 Risk Score

Malware Insights

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

The PDF contains a link farm, with multiple embedded URLs pointing to external PDF files. One of these URLs, 'https://ttraff.me/pify?keyword=evil+smasher+borderlands+2', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a social engineering lure.

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.me/pify?keyword=evil+smasher+borderlands+2
    • http://zatisexat.lovelaughterandreallife.com/uploads/1/3/0/7/130776131/9920680.pdf
    • http://files.myveganmorocco.com/uploads/1/3/2/6/132682134/tivoxuzefudef.pdf
    • http://rawera.9thdtf.com/uploads/1/3/2/6/132681824/2725208.pdf
    • http://files.thelaurawilson.net/uploads/1/3/1/8/131871859/borunalezusi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1145/5645/files/25258672356.pdf
    • https://cdn.shopify.com/s/files/1/0446/1690/8963/files/90180359876.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/39140097621.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1791/files/fegiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/brute_force_attack_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/sixuwuniwetisevum.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/28889053103.pdf
    • https://cdn.shopify.com/s/files/1/0459/1733/9797/files/55428388083.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/gimafubowup.pdf
    • https://cdn.shopify.com/s/files/1/0457/3554/2950/files/game_rpg_android_terbaik_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/6857/8210/files/game_nhp_vai_offline_android_hay_nht.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_off00005c5a.bin
e65e60f5fd3762b70f6ccd511a50a37986c8b44333e90741f24ebce58ac90469
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5A 5356 bytes
font_01_sfnt_off00006e60.bin
3c0aec58d5c5448c87e7865cd9c1316b0b2311d6bde60051e5f2fae4e6736bdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E60 10572 bytes