Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab70b0ff973049f…

MALICIOUS

PDF

42.8 KB Created: 2020-10-29 05:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ece6c52e9210a148f6442c1116ac4416 SHA-1: 9a4107b954fe723298d61435813ed1252c684d6f SHA-256: 3ab70b0ff973049f8e38759e4426bfe31f70d1df363168a74db46b97dd3fdbf6
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large external PDF link farm, suggesting the document's primary purpose is to host or redirect to other malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest an attempt to lure users to malicious sites.

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://ggtraff.ru/123?keyword=ranch+mashed+potatoes+crock+pot
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/55992.pdf
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/e1f2b21.pdf
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/36c49.pdf
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/fawezolotuduniz.pdf
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/lojebekaxabevag_webegud_temorogedetita_sejorajenuloni.pdf
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/mebogiku.pdf
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jufowokedunod/fbr_tax_amnesty_scheme_2019.pdf
    • https://s3.amazonaws.com/davubewu/oxford_advanced_english_vocabulary.pdf
    • https://s3.amazonaws.com/tometubufimopim/nowigetedeguviza.pdf
    • https://s3.amazonaws.com/janodojivi/powerscore_lsat_logic_games_bible_download.pdf
    • https://s3.amazonaws.com/zabevog/balukufidewozoniga.pdf
    • https://s3.amazonaws.com/juxatop/power_of_the_cross_chords.pdf
    • https://s3.amazonaws.com/gupuso/45987893482.pdf
    • https://s3.amazonaws.com/xebuvuwov/pekaj.pdf
    • https://s3.amazonaws.com/pugomonapoxuxe/setoxizilibodaneda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/wasisuxogif.pdf
    • https://s3.amazonaws.com/tobobowu/40851923366.pdf
    • https://s3.amazonaws.com/panokojol/66367601290.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1383/files/64762531532.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/como_utilizamos_la_tecnologia_en_nuestra_vida_diaria.pdf
    • https://s3.amazonaws.com/degisapemifa/math_minutes_8th_grade_worksheets.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_off000068be.bin
bb94d786d9fb0cd142efbcb6c7177ab5096a6b401fcc7d9d8c010ed7a85395c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BE 5352 bytes
font_01_sfnt_off00007ac9.bin
7d15b02e80a46ce9f2229b875e53a266895d89e0e3da00ed7aadc1889f926251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 10220 bytes

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