Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba094f47d362ebca…

MALICIOUS

PDF

44.1 KB Created: 2020-08-28 16:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09bc84e50754b1eca53bf1296326404a SHA-1: fcc360e61aaad167e9a0ddeba27702b51d370903 SHA-256: ba094f47d362ebcadf3eb1048fb263d4f948bd0c6d0d86c2775fb9ee4dd7e996
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, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though garbled, contains the text 'How to build a radio antenna' 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=how+to+build+a+radio+antenna
    • http://files.flindersislandrunning.org/uploads/1/3/2/7/132740285/8215592.pdf
    • http://files.millbrookrotarydirectory.com/uploads/1/3/0/7/130775846/d99ea.pdf
    • https://cdn.shopify.com/s/files/1/0433/3387/7915/files/bajaj_pulsar_150_bs4_spare_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/booklet_template_microsoft_word_2013.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/nuvowamatugur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/bubatolenibuxarujixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/29358630515.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8405/files/thunder_buddies_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/gesareleje.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/dometic_air_conditioners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/botany_book_for_bsc_1st_year.pdf
    • https://cdn.shopify.com/s/files/1/0434/0042/9731/files/logipire.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_off00006445.bin
69e4b89547112482524dce5bd3686de3b6e92b44bcc865d5ddf6736ca8e4a501
pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 4716 bytes
font_01_sfnt_off00007457.bin
096ec812fee129c383d4420ada3d96d25ad2d001ba0b2cace72d18e25dfc0ba3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 9712 bytes
font_02_sfnt_off0000959e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x959E 4324 bytes