Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5feef731db1048…

MALICIOUS

PDF

59.9 KB Created: 2020-08-13 15:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 388aadd0c5f7290e7de8e2a1d3bbaf64 SHA-1: 60327b9e39effbc787a689d6cf6e76ef29380999 SHA-256: 9a5feef731db10480ba86861a22c81acc2c0c5792352af868174f419b2ae9eff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a "Beretta 92fs owners manual pdf". The presence of a link farm and a critical heuristic firing for malicious redirector infrastructure strongly indicates an attempt to drive traffic to malicious sites. No scripts were extracted from this sample.

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=beretta+92fs+owners+manual+pdf
    • http://dedokevig.southingtonjaycees.com/uploads/1/3/0/9/130969352/lariresitunawijaviz.pdf
    • http://files.marshadaniels.com/uploads/1/3/1/8/131857602/vopotiwus-rudukemepab.pdf
    • http://files.tileplus.net/uploads/1/3/1/4/131407406/pikopexum_tevope_matibetubep.pdf
    • http://wibig.fossellfuel.com/uploads/1/3/0/9/130969332/47cc579b.pdf
    • http://pokuzukuf.oakislandcompendium.ca/uploads/1/3/1/3/131380600/a6e57233dd.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/94314075635.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2776/files/volikopawil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/38341272494.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9127/files/diwimimuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/nitro_to_word_converter_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/24781533257.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/pajexos.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/seven_deadly_sins_corey_taylor.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/docsend_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/waxogivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/pufatonejezapawizimota.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_off0000aa87.bin
b69c594bf6b56a3f5c08e306de1724256e9e75ce0c443c95e8c3bc31a43b7236
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA87 5616 bytes
font_01_sfnt_off0000bd98.bin
2ab04a53acac5d1d0a9660c8196edead54d270905e0fa4bf08df161fdcce1412
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD98 10888 bytes