Malicious PDF — malware analysis report

Static analysis result for SHA-256 e526a47f832a9419…

MALICIOUS

PDF

53.9 KB Created: 2020-08-31 01:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f6ac8c5c0bed4fabe0abfcc5943d09d SHA-1: cb9c77cab07a4ac28d4ce4cbfa9745a4a6009575 SHA-256: e526a47f832a94198ed472dee9e3d04689fbabc9df07aa6077cb31592fd3d1bf
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is presented as an 'Hp washing guide'. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The PDF also contains a large number of links to Shopify-hosted PDFs, likely part of a link farm to improve SEO for malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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.ru/wix?keyword=hp+washing+guide
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/calculating_gdp_using_income_approach.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/pedim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/16308548446.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/letter_b_worksheets_for_preschool_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/xopinajezegefozadaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/95543096575.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/sudumotudafeze.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/27350314698.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/88962312969.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/begad.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/spider_man_2018_ppsspp_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6437/files/23995692313.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_off00007f68.bin
fdfd30a54f8e6b00ad46a6ba27c2dc9d17a7b974240143be5de05438d6f99606
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F68 5144 bytes
font_01_sfnt_off000090ef.bin
2fe826d01dcc10ddb28fc043470eaad3c0680f06647abbcbe6f7c3fdec5f44a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x90EF 10676 bytes
font_02_sfnt_off0000b5a3.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06
pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A3 16164 bytes