Malicious PDF — malware analysis report

Static analysis result for SHA-256 1852eb4a7b4c65b2…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 00:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a2aa41ed8eba44fc1d1dff618d64d3 SHA-1: 0a674ddf735b4579aacf8801b952c15b1ca7ff3e SHA-256: 1852eb4a7b4c65b23896a24534beddfc30d22ff20e9b145f544c7b5927127de1
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains. The primary link, 'https://ttraff.ru/pify?keyword=free+fractions+worksheets+grade+1', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to create a link farm or to direct users to malicious content under the guise of educational resources.

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/pify?keyword=free+fractions+worksheets+grade+1
    • http://nolasalu.kasl.us/uploads/1/3/1/4/131409090/galewebizixatuj.pdf
    • http://nititofe.protectgladewatershed.com/uploads/1/3/2/8/132814930/9115994.pdf
    • http://files.kathyarcher.com/uploads/1/3/0/9/130968920/wusodupigepofa_pugaxeluzukizut_xifosaviroxuf_xixarajamawonar.pdf
    • http://files.tetiana.net/uploads/1/3/2/7/132741099/ef6534.pdf
    • http://lebexe.customcrushfitness.com/uploads/1/3/0/8/130813420/9179721.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/givazokuvixor.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/77271653687.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/bupigunetewalenuruxexaje.pdf
    • https://cdn.shopify.com/s/files/1/0437/2280/1306/files/ap_psychology_myers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/joint_stock_company_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nowivozepax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/zotaxonezafuravivamawubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/sumatojafob.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/argumentation_skills.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/38617700766.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_off00005dde.bin
1247248e17a5dd8c80e4643cad4de803852f10fdacbe4ff328801939c2d64447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDE 5412 bytes
font_01_sfnt_off00007057.bin
88a8079d94d209cd9b343cc67983174bac3e98438596ac4bd02aab231a170f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7057 9960 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.