Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8a4eb79c3b9616…

MALICIOUS

PDF

51.2 KB Created: 2020-08-07 21:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfc72e5f8840a0a3f85ac1c24816bb9a SHA-1: 467d6a208405daef3c7878f89bda2c66b6d2fdbd SHA-256: ee8a4eb79c3b96168f6ace4bf4bd6e743c75eb2d69e562686e7ce8842ae83ccd
130 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to downloading educational material, and a prominent link directs to 'ttraff.com', a known malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious site under the guise of accessing academic resources.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=higher+engineering+mathematics+by+bv+ramana+pdf+download
    • http://files.monarchmountainretreat.com/uploads/1/3/1/3/131383480/8991809.pdf
    • http://kudaposu.togethergolden.com/uploads/1/3/1/3/131383664/luwed_mewaxebilunuvex.pdf
    • http://files.columbuschristianacademy.com/uploads/1/3/0/8/130874126/19d18f52.pdf
    • https://cdn.shopify.com/s/files/1/0445/8492/7396/files/alkaline_earth_metals_properties.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/jizejunejinadonesilagomi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/zisaralufegewusewikow.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/88892503508.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/baxijis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/81733925903.pdf
    • https://cdn.shopify.com/s/files/1/0429/9289/4115/files/nuxikiposubetuzagixidako.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/mewebutexiboronejapimope.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/81739325496.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/three_phase_ac_voltage_regulator.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c7.bin
3d9c908998ccaed66d535f975989864f2d56c56ed43426e1df9ff37ca854df60
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 5712 bytes
font_01_sfnt_off0000840e.bin
be06b05722f083b2ae204348814817e6b0e43bda83e8d5a5c43c3d0c0f7d17ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x840E 2484 bytes
font_02_sfnt_off00008f01.bin
af968f904ebddaa0ce167f74e1b6f9111396ea3d7c334940a9125756b33fb1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F01 9908 bytes
font_03_sfnt_off0000b0e2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E2 4324 bytes