Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba75aa6ef7ca9bc…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 20:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7350dae45e30bda02cebee58b4521cc SHA-1: 029aae93fffbbdeae419a2c8773b813649dbb497 SHA-256: 5ba75aa6ef7ca9bc70defa03804851a7ed68ebe4cf9b9ce9fa6e90f8d9f326c3
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used to lure users to potentially harmful content. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links but one is identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for 'top rpg 2019 android'. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly suggest a phishing or redirection attempt.

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=top+rpg+2019+android
    • http://files.onestepborders.com/uploads/1/3/0/8/130874055/pukorixizuj-bunigotav-jewoxaxolom-kobozaxonefija.pdf
    • http://fazavokiw.caledoniaworks.com/uploads/1/3/0/8/130813840/eb3ca6f6dd0.pdf
    • http://sasekoso.codyjwoods.com/uploads/1/3/1/1/131164250/58d1223b68.pdf
    • http://razadajo.lifecoach-sacramento.com/uploads/1/3/2/3/132303195/dezoloxuxifipa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2151/6448/files/nobezut.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/erd_case_study_examples_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7611/5863/files/axis_of_symmetry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/netaradadimonubadefixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/9516760689.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/zofanukuwikadet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5083/4847/files/jurnal_abortus_provokatus.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/67977815186.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/englisch_aufgaben_simple_past.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/lejafif.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_off00007347.bin
89fa1edc436a9994bcb48bf09f646f990e43ae89438b293c64e65b8c930467c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 5348 bytes
font_01_sfnt_off00008585.bin
e6ad5b1405135f61802554b5414360ce5198c16883a159a52bac954a995c2207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8585 10388 bytes

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