Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7c1dc4d8eca7c5…

MALICIOUS

PDF

64.2 KB Created: 2020-08-19 14:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c125f8fbdb06c942dbd6d56860130885 SHA-1: 4f988e33790e9a732ae55c5c9cf5c7aa938f230a SHA-256: 5d7c1dc4d8eca7c5ccfda3d98303f46b935ee5b5bc2c29f2a7179eac149d2196
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a video game guide, likely intended to trick users into clicking the malicious link. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute 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=civilization+vi+deity+guide
    • http://files.maxhamhypnosis.com/uploads/1/3/1/0/131071137/3837161.pdf
    • http://zorumot.yrpm.ca/uploads/1/3/0/7/130775565/763de2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/tagutidewik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/paguxizulosuzimanomowip.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/kinajo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/26416118392.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8302/files/33601477040.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/american_english_file_2_teacher_s_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/how_to_improve_my_english_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3104/files/edible_plants_nz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/94843883037.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/vanilmirth_leveling_guide_talonro.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/powerpoint_templates_free_2017_microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/81197857098.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/mekizuzolidokobejoxisogu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1ec.bin
3d0ad2f158905de3c9bc0ce194cc94c5557ed4ff596c0163ad9ebdeba8f9aac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EC 4836 bytes
font_01_sfnt_off0000c288.bin
9f774d5e80c04a0bbaef92a0a6d988e42e7fef7fe04c15a16ea821b8b8960558		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC288 10352 bytes
font_02_sfnt_off0000e5e9.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 4324 bytes

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