Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bf845e4d8eb5e7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-05 02:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e098ae267122991b74b1963cc075db51 SHA-1: 4cf2e6f438aaec25e68f38664453e53732d56607 SHA-256: c4bf845e4d8eb5e7b6c04bb7b3ca4553157b39245954b8d7395a77e37b1b96f0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL "https://ttraff.cc/pify?keyword=snacks+recipes+book+pdf", suggesting a lure to disguise malicious activity. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of exploit or malicious content delivery.

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=snacks+recipes+book+pdf
    • http://files.thesentimentalgift.com/uploads/1/3/1/4/131483118/044bc.pdf
    • http://files.gmrartstudio.com/uploads/1/3/2/6/132681219/7568295.pdf
    • http://jaxeselis.ellistallman.net/uploads/1/3/0/7/130738836/punonadilas_wepol_dorejaxejajif_sulusej.pdf
    • http://files.dustinmarquel.com/uploads/1/3/1/3/131381352/ropifub.pdf
    • http://files.muskegonrenew.com/uploads/1/3/2/6/132681237/dodogaxebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16485275060.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/mubuzofomumanozelop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/lidiforedivamoxemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/mathematical_analysis_introduction.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/dafofewexexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/puwatorirexironemixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/46495071141.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4952854333.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/xikefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/fodopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2053/files/d_d_3._5_planar_handbook.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_off00006260.bin
406b82d03f30866a9cd58456b806450bbbc45ba750baf6cc73b569b5ad6b72c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 5424 bytes
font_01_sfnt_off000074dd.bin
16e1760dfc160c00d2fec57658a6c47ee398d6ffaee75c0f5f812c3a44623572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74DD 10392 bytes

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