Malicious PDF — malware analysis report

Static analysis result for SHA-256 f358be5d270d4a63…

MALICIOUS

PDF

53.3 KB Created: 2020-08-22 04:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20d4ca9746adc63193cb84a2881a2d9a SHA-1: 519200f847419f9126ebbaee8abb4ba5cb8a0823 SHA-256: f358be5d270d4a63e1a1af298c7c1c3fb39e40aac56ac1c15cbeab612a9de9b5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Interim report means in telugu' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm strategy, likely to obscure the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=interim+report+means+in+telugu
    • http://files.newseedspriory.org/uploads/1/3/1/4/131438708/5534735.pdf
    • http://julezum.eaglehavenwinery.com/uploads/1/3/0/9/130969368/835ceccf1d2181.pdf
    • http://files.kindredconnectionsgen.com/uploads/1/3/2/6/132682758/terev_rigunaruj.pdf
    • http://kudujom.natashahanova.com/uploads/1/3/1/0/131070306/3584123.pdf
    • http://wijujisu.mrsehling.com/uploads/1/3/0/8/130874600/05c0c7286.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6582/files/gufizu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/abortus_provokatus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/chitralahari_telugu_movie_in_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/brainspace_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/7696299629.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/repovan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0454/7074/4742/files/always_on_display_apk_for_samsung_a20.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/nemuxevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0922/files/convert_webpage_to_chrome_extension.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/xozawisod.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6561/files/mijepewisijusuwitigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2343/files/2643901057.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/39416504629.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c0f.bin
433cce0dc712136a0fb2a356a1767344cada49ce43e92488bad307751cbb0d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0F 4960 bytes
font_01_sfnt_off00005cbc.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBC 3720 bytes
font_02_sfnt_off0000681e.bin
8c8cffe54ae4b3533c6d846654fd99148abf1c9dcb52d22d3c4229fb3cbe8c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 9836 bytes
font_03_sfnt_off000089f0.bin
e475b127670123e0992d690554a82105660adb0ac795948380663d104441f777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F0 16064 bytes
font_04_sfnt_off00009e7f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E7F 4324 bytes
font_05_sfnt_off0000ac80.bin
c627f6564b6dd90da5353cc54fd6d605536b437ac147c020df69c37e7619e973		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC80 7628 bytes

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