Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c65481168ceb838…

MALICIOUS

PDF

43.8 KB Created: 2020-08-20 07:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 358f6cb6954a0ae0cb0640a0e36606df SHA-1: 12e330370701039bc218274fffc1955bb8bc99da SHA-256: 2c65481168ceb83857c44c0e42c0ed4c7b1a68f72efaa2f9cd503f6d5717f5b1
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 disguised as a download for 'boom beach apk mod android 1'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various files, many hosted on Shopify. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/pify?keyword=boom+beach+apk+mod+android+1
    • http://files.publishershaven.com/uploads/1/3/1/4/131406744/1ab589685fe7b92.pdf
    • http://files.allicphotographyanddesign.com/uploads/1/3/1/6/131637073/winaz_tulezaz_gujoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/cookie_clicker_tampermonkey.pdf
    • https://cdn.shopify.com/s/files/1/0436/1191/4403/files/reciclar_botellas_de_plastico_manualidades_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/6502400958.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/jixutijavusujolikadaror.pdf
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/mereserabuwadomirefijulas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/legopenotitafo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3913/6661/files/49966082249.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/sales_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/16114025821.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/batunirusunoj.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_off0000602d.bin
93b8e9d47b2d1d8b843b0e5abe5f0b8bee91644e65a83cbe35dbf8e3569ab2cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x602D 5116 bytes
font_01_sfnt_off00007153.bin
6cadd79b04c53270ae6471ea3adc46b1adc46dbd2ddb6ebef79072be8bf9fe5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 10260 bytes
font_02_sfnt_off0000946b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x946B 4324 bytes