Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b748e91727be21…

MALICIOUS

PDF

50.7 KB Created: 2020-08-05 00:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fea94c953c53b052d5be9c059f15e9e SHA-1: 50f574c8e0f037792d2daa3035b65c94044dcc7c SHA-256: 83b748e91727be213dd574fc2540d7f3f874340c6da511e4c8296ebc7660f7e6
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm' and another flagging a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a phishing or spam campaign aiming to drive traffic to potentially harmful sites. No scripts were extracted from this sample.

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=html+to+pdf+using+react
    • http://files.familyfirstinflatables.com/uploads/1/3/1/4/131452949/d359c596.pdf
    • http://files.lukestoneart.com/uploads/1/3/1/0/131071240/suxubokeruwab.pdf
    • http://files.deerwoodmensclub.com/uploads/1/3/1/3/131379246/2361912.pdf
    • http://files.rosminicentrewisbech.org/uploads/1/3/0/9/130969728/vekogud-tositujane-pafinadox.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/90563758284.pdf
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/40641102572.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/cours_grammaire_francais_facile.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/jolovimixelomadu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/definition_of_economics_by_different_economists.pdf
    • https://cdn.shopify.com/s/files/1/0435/2802/8312/files/xazaxuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/5721238651.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/18135275499.pdf
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/4427913680.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/25607493521.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/diworawusegazosigap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2527/files/kobuwexen.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000648e.bin
1204f4e5bfdcfd92957424f04ae746750f6ad71559dfd358cdd67b51006d5fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648E 5316 bytes
font_01_sfnt_off0000767f.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 1800 bytes
font_02_sfnt_off00007f0d.bin
c5df990d598b4951bc3b2642c071f8e7aa47efecb9464ab17c884a83e64b22f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0D 15512 bytes
font_03_sfnt_off0000af93.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF93 4324 bytes

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