Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28087444aaf6363…

MALICIOUS

PDF

55.9 KB Created: 2020-07-31 03:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea595b0d21f06394ff8d6a3cc259a724 SHA-1: 295bb5a9ddb8202a116e8d72a42a48c987b17783 SHA-256: a28087444aaf6363489eb960daea53c82e3d08fb7b75a0f8e8a8a14dc6647948
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to appear as a legitimate download source for 'Bsc physics books pdf download'. This is a common lure for SEO poisoning attacks. The primary link redirects to 'ttraff.com', a known malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=bsc+physics+books+pdf+download
    • http://files.islshenzhen.com/uploads/1/3/0/7/130740530/ruzuxiwenur.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.pamelaarmstronggallery.com/uploads/1/3/0/7/130776599/tisuwagimiwoxesuzaf.pdf
    • http://files.regalbakeryusa.com/uploads/1/3/1/4/131406412/7743718.pdf
    • http://files.madewithlove97.com/uploads/1/3/2/6/132696465/kobotadokizid-wuwibonijukus.pdf
    • http://files.regalbakeryusa.com/uploads/1/3/1/4/131406412/7
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/19185744936.pdf
    • https://cdn.shopify.com/s/files/1/0433/1582/2747/files/24580405814.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/sowobupowufaxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/kufikanowu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/75447985138.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/vozuvofoja.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/sidasawubirije.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/73047759692.pdf
    • https://cdn.shopify.com/s/files/1/0437/7618/0376/files/58761761862.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/morabakavononodomis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/83416675956.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/12316815164.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/

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070bc.bin
2c728b27aad8a376fa14c5531d6f31dc24e0ece9bb3dde5b3e520a21fe856349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 5184 bytes
font_01_sfnt_off0000825a.bin
55deeea3a93518db721a97da0d8f9359fab86ec4add728a48e55287c41c27800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 3204 bytes
font_02_sfnt_off00008f4a.bin
7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4A 2320 bytes
font_03_sfnt_off0000999a.bin
5082137c94320138b99816ee572b8c858f661f668572cca696cdd401db636408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999A 10012 bytes
font_04_sfnt_off0000bbc7.bin
5f3bf50395e8d1b65f29ab90a426c3665da69f8437ae50e88eef237d5e22552a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC7 16224 bytes

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