Malicious PDF — malware analysis report

Static analysis result for SHA-256 294f3a6dd30e4631…

MALICIOUS

PDF

45.5 KB Created: 2020-08-25 13:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa1100b7f698537a2f2a344184525f90 SHA-1: e7b0d1fe3fe348d9a25c6e9090668d649123e6ec SHA-256: 294f3a6dd30e463196d6c6eb46466d210d3299a9df68f8751931803e17f0a86d
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text related to 'intermolecular forces and strengths pogil answer key', suggesting a lure to trick users into clicking the malicious link. The presence of a PDF link farm heuristic further supports the malicious intent of distributing links.

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=intermolecular+forces+and+strengths+pogil+answer+key
    • http://files.behinddallas.com/uploads/1/3/1/3/131382092/sugutomipi_mewadawagixam_zelubam_sedijutiz.pdf
    • http://files.jamesballardmusic.com/uploads/1/3/1/3/131383247/130d4c2988a.pdf
    • http://files.guyerfoundation.org/uploads/1/3/0/7/130776089/2102086.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/conversions_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/brew_install_gpg.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/gumat.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/93171570809.pdf
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/nejomobodagopekutem.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/33538212043.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/86847305415.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/list_of_cell_organelles_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/mathematical_methods_of_physics_by_satya_prakash.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_off00005c1b.bin
90295219a1bd773f1d44fa6a10dae728941a7275a8eac122ef17dba160477912
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1B 5764 bytes
font_01_sfnt_off00006f9f.bin
d101e2f42b650de8716105069ec5ebb830422ff4c55d275a730070291a3531fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 10664 bytes
font_02_sfnt_off0000939d.bin
b9f25633d080e3c57a281a21f8bbd7ee01ff693cb9a059131e58c0fb969e41ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x939D 16084 bytes