Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b6db4aa067ef6f…

MALICIOUS

PDF

72.5 KB Created: 2020-08-12 02:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e88ee8e07dbeba3a6b4a1f7cba271ba2 SHA-1: 638166625cbae259823dfc3c5fec91d344d1e172 SHA-256: b0b6db4aa067ef6f7db2e847459b4bdc2b276331f02bf40e386e3adfff2591bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious link disguised as a document title, which redirects to a known malicious infrastructure. The ML classifier strongly indicates maliciousness. The document body contains the URL and a lure related to a 'balanced photodetector pdf', suggesting a social engineering attempt to trick the user into clicking the 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.cc/pify?keyword=balanced+photodetector+pdf
    • http://files.midvalleyartsleague.org/uploads/1/3/1/3/131380297/konamed.pdf
    • http://files.joyceflerdesigns.com/uploads/1/3/0/7/130739590/8529653.pdf
    • http://files.bigcountryconcrete.com.au/uploads/1/3/0/9/130969659/1878786.pdf
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdf
    • http://files.relativesintheattic.com/uploads/1/3/1/4/131483200/xugefemetukokiralizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/17807082852.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/nelafeloviputasidajunogu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/global_asset_allocation.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2919/files/11878762307.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/pathfinder_inquisitor_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/bapijarazan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/solelogoridexoraze.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/19610386710.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7498/files/passive_voice_simple_past.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0259/files/gumun.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_off0000d2ef.bin
8fe3f7232e0a89ea27685e6b240e38a8619b5a164532c7f8dbee5602d5224c00
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 4852 bytes
font_01_sfnt_off0000e357.bin
477aafc28af7af768c80f004caefaef5963a859306c08396b74e64adf21fe3e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE357 10356 bytes
font_02_sfnt_off000106b9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 4324 bytes