Malicious PDF — malware analysis report

Static analysis result for SHA-256 8423b1b985588424…

MALICIOUS

PDF

46.0 KB Created: 2020-10-28 00:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 423f5055c74f4d570bd26841a556608c SHA-1: 5c5a0c466db0d1ce49e8ced6ce880bc76aac0c0e SHA-256: 8423b1b985588424e8d5f6db55626c76b107d564e4b77cb1aaff85f1c7226d4a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a crossword puzzle answer key. The document body and heuristics indicate a redirection attempt to 'https://ttraff.ru/123?keyword=energy+transformation+crossword+puzzle+answer+key'. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to obscure the malicious redirector.

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.ru/123?keyword=energy+transformation+crossword+puzzle+answer+key
    • https://vapufubewadul.weebly.com/uploads/1/3/4/4/134485241/silitixenujame_letuxa.pdf
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/kudepazi.pdf
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/darek.pdf
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/duvunot.pdf
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/7087038.pdf
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/funim.pdf
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/3702144.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/gutajese.pdf
    • https://cdn.shopify.com/s/files/1/0503/0884/1657/files/kotetobofoduz.pdf
    • https://cdn.shopify.com/s/files/1/0499/2624/2472/files/my_oldboy_pro_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0484/5548/3546/files/27464246673.pdf
    • https://cdn.shopify.com/s/files/1/0498/4717/3286/files/fgo_summer_event_2020_guide_jp.pdf
    • https://cdn.shopify.com/s/files/1/0497/7501/8151/files/torque_detail_mirror_shine_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0501/9903/6058/files/causes_of_urbanisation.pdf
    • https://cdn.shopify.com/s/files/1/0499/3210/7937/files/construction_safety_signage.pdf
    • https://cdn.shopify.com/s/files/1/0268/9125/6007/files/koxatapi.pdf
    • https://s3.amazonaws.com/bugutaj/abituriyent_1-_7_matematika.pdf
    • https://s3.amazonaws.com/sizadagazagaj/dugafijafo.pdf
    • https://s3.amazonaws.com/loxopudizus/63063689399.pdf
    • https://s3.amazonaws.com/sugaguxagu/capitalization_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0499/8365/1990/files/runewiwatirazarejikimijup.pdf
    • https://cdn.shopify.com/s/files/1/0493/6063/4015/files/ati_b276_driver_windows_7.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_off0000649c.bin
ceea37e697df5e7dc375fbb3534e1c87cdfd327dec12bd76274db8776b211b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 5620 bytes
font_01_sfnt_off000077c6.bin
a7c250c0a2272a1b4b425adaefcba28f3a08cadf12480706d8afafbdba69f1b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 10684 bytes
font_02_sfnt_off00009bde.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BDE 4324 bytes

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