Malicious PDF — malware analysis report

Static analysis result for SHA-256 d070034c102852b1…

MALICIOUS

PDF

64.3 KB Created: 2020-08-26 22:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcfd2bfa166afb15423cedd66170ff76 SHA-1: 74003e63e9177230e2ea40df7ecb0c7ae6bcf149 SHA-256: d070034c102852b14b89d83441e87ce053329d8ead2938500801018d877b4ae2
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous external links suggests a link farm used for SEO poisoning or to distribute further payloads.

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=les+aires+du+cerveau+et+leurs+fonctions
    • http://dikopovis.georgerichards.net/uploads/1/3/2/6/132682883/besuj.pdf
    • http://files.newbrunswicktakeout.com/uploads/1/3/2/3/132303013/7638904.pdf
    • http://files.worthingarchaeological.org/uploads/1/3/1/4/131409508/4504623.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/88250688193.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/53384383464.pdf
    • https://cdn.shopify.com/s/files/1/0439/4886/7742/files/wegupewir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/coordinate_geometry_worksheet_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/71542037190.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9998/files/41274478806.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/rorajugorazenurolasasuwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9127/files/vetebajowowojoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2751/1961/files/vabajajakat.pdf
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/execlp_vs_execvp.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/36964554778.pdf
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/mangalore_today_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/comparer_des_aires_cm1.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/sindrome_anemico_en_el_embarazo.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_off0000b9cd.bin
e5c7bf1ba6f2cb14149270fe8bfb80c62d84b17198af8f107a71b7af553fd52b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CD 5016 bytes
font_01_sfnt_off0000caea.bin
b17d0b75d07040da705c546d2d30ba2beb6a1b1297ff916950a60e3706966fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 12544 bytes