Malicious PDF — malware analysis report

Static analysis result for SHA-256 5370db9abd670ca6…

MALICIOUS

PDF

61.7 KB Created: 2020-08-12 22:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 069577e9b92a158714bd205c50b1c3f2 SHA-1: b45f73b7731a2e24ae51e88081101b967d5151b1 SHA-256: 5370db9abd670ca6524b62a12940c0b993d7bfa161056f44bc7c9ed6769e53c5
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body text, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=treasures+grammar+practice+book+grade+2+pdf', indicating a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=treasures+grammar+practice+book+grade+2+pdf
    • http://baxosaxiv.lostintimegraphics.com/uploads/1/3/1/1/131164574/97cfae4d.pdf
    • http://tajof.lcfanaheim.org/uploads/1/3/1/3/131384429/nojitorowetepomalose.pdf
    • http://files.outfitformulacapsulewardrobe.com/uploads/1/3/0/8/130874201/vamoje-kifiwuke-gedisobijubuti.pdf
    • http://files.zendixie.com/uploads/1/3/0/8/130815213/xipasexonup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/luruwanekelepijowedo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/fazijedezofemisudibonowex.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/xaperezemabajivogobuf.pdf
    • https://cdn.shopify.com/s/files/1/0452/0129/3461/files/82673320634.pdf
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/nakilege.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/10960716704.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/6441533237.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/44097998618.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/14033793354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/lomulimujejikagitud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/lagusafovuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55628578329.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_off00008769.bin
4eec3b93fc88e2af2ef159723596024df3e1fd547e2a1236665824ed80e4421d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 10088 bytes
font_01_sfnt_off0000a8ba.bin
2da6c79f86c22e2929ae324aeb8976a8758d6e702a05dde6f2df3e2d56098895
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8BA 5728 bytes
font_02_sfnt_off0000bc1d.bin
1cca786275b7b99c46a8875d0c887b21b8e11e4796951f8df514437fa51d629c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1D 13772 bytes