Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcba2151f08bff1…

MALICIOUS

PDF

59.4 KB Created: 2020-08-16 23:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e472abc5a8262b9cc5a9de00bd51339 SHA-1: 1a30c617e58f1879014a71428db669cb26d0574a SHA-256: 7bcba2151f08bff1e4d2872ca33ff2c22a3cdf8fab875e2d3ae56ddee7420bad
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to create a link farm. One critical heuristic identified a link to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the string 'birthday invitation design templates' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=birthday+invitation+design+templates
    • http://vizuza.summersautomotivedetailing.co.uk/uploads/1/3/1/0/131071164/4085405.pdf
    • http://jokepajan.coatscounseling.com/uploads/1/3/1/0/131070702/pefokatakajiw.pdf
    • http://newinur.artclassdallas.com/uploads/1/3/2/6/132695969/majodo.pdf
    • http://files.marleemoses.com/uploads/1/3/2/6/132681558/nejojudasiwajiwexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/pikobalalogulorewewasuwef.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/24354803805.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/desefevalawoxov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/sapupadabetisolemoziw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8304/6813/files/94290300406.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/53431784530.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/sed_replace_newline.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/29231745184.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/gexefebuxukekomesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/nekukodopitojejajofuvinik.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_off00009b5f.bin
8266ccede4e87942362123139ce3840a214f09f8a115255788b8bd30bcef6ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5F 5372 bytes
font_01_sfnt_off0000ad83.bin
b1922c08ecf6f4bdf6395f386340c1a4e4f61d1ca9da26b82c603b41c0143e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD83 10996 bytes
font_02_sfnt_off0000d252.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD252 4324 bytes

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