Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb1d1c769b084d8…

MALICIOUS

PDF

48.1 KB Created: 2020-08-25 12:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 152e7c387a92db2ba4ff4b787996d2e2 SHA-1: 35e7dc7220c19f2ccf04e94c2ed0e78630a9c35b SHA-256: 4fb1d1c769b084d82d3ef69a55a43c0adeda73fabad22a3d62e373a9d00e0c0e
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a movie title, suggesting a lure for users to click the link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=agneepath+full+movie+1990+hd+1080p
    • http://jibivos.carpetcleaningstpete.com/uploads/1/3/0/7/130738948/zikuvunowimabafasor.pdf
    • http://nileni.skiingisbelieving.org/uploads/1/3/1/4/131438379/f90573.pdf
    • http://jibivos.carpetcleaningstpet
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/sogikaxapanafofumizowimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/born_shoes_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8694/files/vafudabajigotav.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/jesumiwakodujeduluwoke.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/kifeximilitexuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3076/4955/files/catalogo_de_mary_kay_julio_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/6493/1992/files/manalijumij.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2758/files/20227221543.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/gifob.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0560/files/lenejewojikutijeloxara.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/sowewitovokajuzodasaxid.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_off000064fc.bin
40d60daab686713ea08e9e224e72d4e4de14f952adcf63f5906f9c0c5b485c72
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FC 5772 bytes
font_01_sfnt_off0000789a.bin
0a33b37b0ccf021ae57ce0e82e1dd275bb45a96827b8f05c1736570f2cb8812c
pdf-font-stream PDF embedded font (sfnt) at offset 0x789A 10828 bytes
font_02_sfnt_off00009dd6.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD6 16164 bytes