Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a9c8bdfd8df588…

MALICIOUS

PDF

46.3 KB Created: 2020-08-22 00:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 900b14165b18360c0b69e00c74614a5b SHA-1: bcc7b55c2f74b805984c454c52fe5eb99fc275f3 SHA-256: 08a9c8bdfd8df5887307adb7db7a13f949b7af157eb2cd218c2d5dad1f0abadb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document body, though obfuscated, contains text related to "Hollywood movies" and URLs, suggesting a lure to drive traffic to potentially malicious or SEO-farmed content. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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.cc/pify?keyword=hollywood+movies++top+10+websites
    • http://bodibak.siwardnewton.com/uploads/1/3/1/8/131857419/ligevuturatog.pdf
    • http://furuwene.turneraviationfremont.com/uploads/1/3/0/7/130776445/1911834.pdf
    • http://files.chrissysfantasyfaces.com/uploads/1/3/1/1/131164488/8887.pdf
    • http://perudegej.vkshah.info/uploads/1/3/1/3/131383613/403fdebd95613ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0069/0848/files/57982442695.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8890/files/92221172726.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/charlie_full_movie_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/21580169306.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/47423749454.pdf
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/association_of_former_students_tailgate.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/gewozalopadugobuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/1772/2280/files/crib_mattress_fitted_sheet_size.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/40101955036.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7283/files/67794873048.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/cell_culture_techniques.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007622.bin
04f5339c55d5d214cfc74276b047f75ea4bc1a4df2e65a4a54509daabd89c679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7622 5348 bytes
font_01_sfnt_off00008864.bin
bbc46808ff11b23892012640dbd0f7d000e9ef52180894c7ce471fd9d06dcc5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 10292 bytes

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