Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86a0803da12f5c7…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 18:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bfd6629c91eaa4b71678b78f67f77f2 SHA-1: d5dc72e5472b85d13aca70b44a96b21ff91bc0ec SHA-256: b86a0803da12f5c7dbdc80d515c63f9a27f3923f413a778731efe3bc04cc89ec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring the user to a malicious site via the embedded link.

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.com/pify?keyword=cell+parts+and+function+review+worksheet
    • http://gukaw.aquanautsoflivingston.co.uk/uploads/1/3/1/4/131453674/neligipijowopalis.pdf
    • http://files.seattlecrt.com/uploads/1/3/2/6/132680781/radaxul_xazuzara_sudumumo.pdf
    • http://files.botanaorganics.com/uploads/1/3/0/7/130776499/3723279.pdf
    • http://pekinogo.rattlerbands.org/uploads/1/3/1/3/131378779/8bd2fab54c5.pdf
    • http://files.camerashyportraits.com/uploads/1/3/0/8/130814596/7551422.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7253/files/dibijevumewezomelu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/a_ha_take_on_me_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/29417039371.pdf
    • https://cdn.shopify.com/s/files/1/0437/0196/0854/files/bairavaa_songs_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/63444798985.pdf
    • https://cdn.shopify.com/s/files/1/0433/4167/6694/files/betches_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2496/3990/files/3612065384.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/97118444332.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/48499878854.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/5025039572.pdf
    • https://cdn.shopify.com/s/files/1/0438/7835/1003/files/adquation_formation_emploi.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_off00006707.bin
e9bf3b2d631d0e53ce82b1d853bb717d52e2570fee96a10ec3c81a4a050880af
pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 5364 bytes
font_01_sfnt_off0000794e.bin
ea531004a0420c9ad5d77e45004264ae113ef04669a82b6a0453ac6f6cdba8f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x794E 10024 bytes