Malicious PDF — malware analysis report

Static analysis result for SHA-256 a365885a34410d71…

MALICIOUS

PDF

69.9 KB Created: 2020-08-08 03:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 218a0e852a45dca6b259cadd30e60878 SHA-1: 18d5afa08124811409354b36def947ec35b3770f SHA-256: a365885a34410d7127c353d00236be5596d4984e1307ad93d45f6c34b73c20fc
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to various shopify domains and a suspicious redirector at 'ttraff.com'. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely lead to malicious content or phishing sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=circle+of+fifths+bass+clef+pdf
    • http://files.rubbertrackswarehouse.com/uploads/1/3/0/8/130874063/bufitej-wazijuxofimo-zuxuzi-mamabi.pdf
    • http://files.aukidesigns.com/uploads/1/3/1/4/131437889/1233572.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://files.nctfconcealment.com/uploads/1/3/1/8/131856308/tariwiwezel.pdf
    • http://files.yearble.com/uploads/1/3/0/9/130969735/7751bf766afa274.pdf
    • https://cdn.shopify.com/s/files/1/0436/1220/9315/files/google_earth_weather.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/bosilabisosilodu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/online_story_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/dojuzumifesa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/45003326298.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/college_physics_volume_2_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/varewujisud.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/rowabuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/42729118182.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/22527066849.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/96370271869.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1c3.bin
8980e2f3015a5563655d0b25b317e7fa5920e2de3538d416ece38e0a8154198d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C3 5088 bytes
font_01_sfnt_off0000c313.bin
9bf91ec13d2cb8bfb65d0c2c995f3f526eeb2e48ad1896b4733cf4ba5d629bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC313 10376 bytes
font_02_sfnt_off0000e6c9.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 16120 bytes
font_03_sfnt_off0000fbb0.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 4324 bytes

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