Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ae474e90c0a19e…

MALICIOUS

PDF

62.1 KB Created: 2020-09-06 14:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 314854dba4e6649db41a1cf95fbe21f9 SHA-1: 14478c74f88c5c6b834978aba4a95c3951428c8f SHA-256: 97ae474e90c0a19eb30b62c9ff2de713d50e9be6bfcc5cd302cab74e16c32590
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 'https://ttraff.me/wix?keyword=platform+business+model+hbr'. This URL is presented within the document body, suggesting a social engineering lure to a malicious site. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates maliciousness.

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.me/wix?keyword=platform+business+model+hbr
    • https://cdn.shopify.com/s/files/1/0431/7131/5876/files/78434876334.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7913/files/rejilopifuvapef.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/31782640022.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7333/files/cch_ct_thnh_nh.pdf
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/formal_synonyms_for_because.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5bd33ce2b044034aaaf29287af45e58.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdf
    • https://cdn.shopify.com/s/files/1/0431/6554/8708/files/fageguzatokamejidelew.pdf
    • https://cdn.shopify.com/s/files/1/0431/3812/1895/files/motu_patlu_ke_cartoon_ho_jaye.pdf
    • https://cdn.shopify.com/s/files/1/0438/0730/9984/files/28333719342.pdf
    • https://cdn.shopify.com/s/files/1/0437/8899/2674/files/newunuguvur.pdf
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/29543273132.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/brazilian_portuguese_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0428/9590/0828/files/vakujidupagobotazigun.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/lulixotobimugakojobiz.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_off0000b58b.bin
5c895b15adecaaba4004a377b1e126621219478672ee9a3b76b7bcbba380a795
pdf-font-stream PDF embedded font (sfnt) at offset 0xB58B 5288 bytes
font_01_sfnt_off0000c755.bin
3fccba57c4eb56bb8885ffbf5e8ff1ce8ef10c01d6694b9551d99f2200bc8b3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC755 10640 bytes