Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8a9a43348a5e03…

MALICIOUS

PDF

48.5 KB Created: 2020-08-23 20:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32bb9367716ed49418415fb03b7928c0 SHA-1: bfae9805d2b4783199557c34b63ec2ade41b3533 SHA-256: 7d8a9a43348a5e0355eacfef41ba9edd47983ecf6f803893580a25d4c8e97593
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting the intent is to lure the user to a compromised site. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=birches+poem+analysis+pdf
    • http://natuk.scorpiontv.us/uploads/1/3/1/3/131383483/sugepujenawonuve.pdf
    • http://files.classicwindowsandsiding.com/uploads/1/3/0/9/130969315/6808a1727.pdf
    • http://files.jessicacloarec.com/uploads/1/3/2/6/132681156/3154861.pdf
    • http://zenulapem.jamquest.org/uploads/1/3/0/7/130775045/logatanize.pdf
    • http://setuwiler.jillrumleyart.com/uploads/1/3/1/3/131398547/dikuvopimewobolut.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/6269306086.pdf
    • https://cdn.shopify.com/s/files/1/0435/6712/0539/files/encyclopedia_brown_cracks_the_case.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/95952985369.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/career_guidance_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5397/files/lumobobazixojo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/72514512551.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/biology_ebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9854/files/41247979874.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/32777220493.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/dnd_human_variant.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/86020307526.pdf
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/widixolimapaju.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/my_little_pony_coloring_sheets.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_off00007405.bin
e781e4db93eeec96d7b9cea2a7e63d8beda9ff108358deec9f030b848e406bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7405 5256 bytes
font_01_sfnt_off000085ab.bin
edca09b7e4ba48cfc9a94537fde7668cea6483a184b8258dbbd951959fbace15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AB 9620 bytes
font_02_sfnt_off0000a6a4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6A4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.