Malicious PDF — malware analysis report

Static analysis result for SHA-256 a301b0874ec1cb8f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 03:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df4f78505156bc7b3561cdbbd4cf1e77 SHA-1: 9613a37db0e0d7e5ab6a0f4d44dbd149dd813e47 SHA-256: a301b0874ec1cb8f86a9cf205f3044c539488285c22737c855f5bebfcaeeac25
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at `https://ttraff.com/pify?keyword=dawn+of+isles+leveling+guide`. The document body, though partially corrupted, suggests a lure related to a game leveling guide, likely intended to trick users into clicking the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to improve SEO and distribute the malicious content.

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=dawn+of+isles+leveling+guide
    • http://files.montgomerycountyhumanesocietync.com/uploads/1/3/0/9/130969742/a67f024c6fecb79.pdf
    • http://wulem.whalingfire.com/uploads/1/3/1/4/131406744/dc4335a868d923a.pdf
    • http://files.rolfgohdes.net/uploads/1/3/1/0/131070035/1718620.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/tikabuxowodidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/93224692028.pdf
    • https://cdn.shopify.com/s/files/1/0431/5611/1520/files/92440496395.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/rolazi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/canonization_poem_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0644/files/dowobokarukopafivazapire.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1125/files/51723899714.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/chronicles_of_riddick_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0459/2317/2503/files/hydro_test_inspection_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/rejavugowalogive.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/68590787320.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_off00005eea.bin
5118f157540c8177a9c02d3457a7c301097ffb8084ee0f274783f54eb09cd6a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 5132 bytes
font_01_sfnt_off0000708a.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 1800 bytes
font_02_sfnt_off00007918.bin
f9aa87f1257c042420a588f1eada080d19c99bdcf1449d22d69ac2719ed123c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 10216 bytes

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