Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d0724648a7d7e6…

MALICIOUS

PDF

32.0 KB Created: 2020-08-20 13:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3723d1307d5c7b36c35b0df7f37040df SHA-1: cec162075bb9df88e2f433160f718008ebf34577 SHA-256: 62d0724648a7d7e6e61fb82afd77d864605f915a03f6826be12b562cc018043a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=that+what+bilbo+baggins+hates+song'. The ML classifier also strongly indicated maliciousness.

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=that+what+bilbo+baggins+hates+song
    • http://files.lakeantoine.org/uploads/1/3/0/7/130775868/7897415.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/5407/1709/files/calf_strain_rehab_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/75192549838.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/pabobor.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/xavepewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/inoculation_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/2617/7438/files/panchangam_2016_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2891/2040/files/74206192843.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/vbscript_for_loop.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/world_time_extended_version.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9617/files/apple_airplay_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/organic_chemistry_functional_groups_table.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_off000041bd.bin
dc815520961f77c6295857e6af5da0ddea5316941c20a4d274313ccccc0dce07
pdf-font-stream PDF embedded font (sfnt) at offset 0x41BD 5032 bytes
font_01_sfnt_off000052ed.bin
d317cc09c9625716070391544a3c0b8e4ae1de37843b20bfb1397090b133105e
pdf-font-stream PDF embedded font (sfnt) at offset 0x52ED 9536 bytes