Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f93a546e778a645…

MALICIOUS

PDF

42.9 KB Created: 2020-08-19 19:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6331679e54d6a299fa982663f294c27 SHA-1: 596202735b4d4865379a442e0f775fa3bed64327 SHA-256: 9f93a546e778a645b2c1ccc72bbad1a836db21222af5d218f466e14e1d4bcbbe
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Movie tv guide australia' and the malicious URL, suggesting a lure. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged by the PDF_SEO_LINK_FARM heuristic. The primary malicious IOC is the redirector URL.

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=movie+tv+guide+australia
    • http://files.katiewhitford.com/uploads/1/3/0/7/130740596/tebajilegowebew-vokaposum-vukox-rabil.pdf
    • http://files.sofiagomezuribe.com/uploads/1/3/1/4/131453267/voselusujoxefate.pdf
    • http://files.trinitylutheranchurch.com/uploads/1/3/1/3/131379830/rulixovuxekape.pdf
    • http://negejumet.dagray.net/uploads/1/3/1/0/131070611/bepuxaxib-daxetotom-timaduxazowemow-fujebaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/ma_real_estate_tax_abatement_form.pdf
    • https://cdn.shopify.com/s/files/1/0448/2239/7088/files/chamatkar_picture_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/2582/5955/files/notafafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/8899038360.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/lupipego.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/2337579258.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/11339452374.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2505/files/bivasejesudek.pdf
    • https://cdn.shopify.com/s/files/1/0428/0451/0887/files/algebra_1_textbook_prentice_hall_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/gasarudapekanesudof.pdf
    • https://cdn.shopify.com/s/files/1/0432/4507/6647/files/11414083592.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_off000068e5.bin
dd5c8f788416e25f01f2df230d5f52922c3accb345fe30e88a31b349978a5d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E5 5056 bytes
font_01_sfnt_off00007a37.bin
4e963a591474a0063de06445a50bc26e120cbf583bd51624f177c27dfbe0c72e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A37 10820 bytes