Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d6e48182eb4222…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 16:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ffb13c68ae129a2c9c8f678177c4c4f SHA-1: 27017a5e92da343127470696b74229250c97c0cd SHA-256: 13d6e48182eb422233ddd24a0292d0fa84b7553d676826b2e325c6c34c6b86d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass link farm, with many links pointing to external PDFs, and one prominent link to a known malicious redirector. The document body text, while obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=best+blogger+template+for+adsense', suggesting a lure to attract users interested in blogging templates. The presence of numerous PDF links and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=best+blogger+template+for+adsense
    • http://files.macombbattingcages.com/uploads/1/3/0/7/130776875/918238.pdf
    • http://files.myflicktv.com/uploads/1/3/1/4/131454521/7f20b78004c5.pdf
    • http://depavom.stitchconnect.co/uploads/1/3/1/3/131398560/tixalimoliwa_rojik_tamix.pdf
    • http://kedumiz.considerhimoutreach.com/uploads/1/3/1/4/131408899/luzaniwabetixufut.pdf
    • http://gabib.vibespotexperience.net/uploads/1/3/2/6/132695306/b4d9769e7e7c0b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/7074928837.pdf
    • https://cdn.shopify.com/s/files/1/0431/9153/3725/files/totesupareridodapino.pdf
    • https://cdn.shopify.com/s/files/1/0435/6902/1089/files/70850967335.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/8692150396.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/ataullah_iskenderi_hikem_i_ataiyye.pdf
    • https://cdn.shopify.com/s/files/1/0433/9951/2231/files/51574803821.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/30451627883.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/wadobevuz.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006042.bin
ad7787901dd62567ceddaf55ccb552498830e9a6bf033472cd7be316bf0d9015
pdf-font-stream PDF embedded font (sfnt) at offset 0x6042 5552 bytes
font_01_sfnt_off00007304.bin
eb45133d2ad66cb3a58551810c78efbbee278c1d56937dfb63260cc66ab80d0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7304 9804 bytes