Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d596eb96623dd05…

MALICIOUS

PDF

44.8 KB Created: 2020-08-04 23:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cc529596d83011ceabbcac28e7b6ba0 SHA-1: c10118550d36a8333f2ca853f8c71b5cb3c8b2a2 SHA-256: 4d596eb96623dd05e379137444c2b6b633c722787a37f6fa980b6252f3baa0db
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'referencias apa ejemplos pdf' and the primary malicious URL. This suggests the document is designed to lure the user into clicking the malicious link, likely leading to further compromise.

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=referencias+apa+ejemplos+pdf
    • http://files.honitonforum.org/uploads/1/3/1/4/131438641/dakomade-getezuwoviwe-takarotuzif-libiludezibo.pdf
    • http://files.mccarranferguson.com/uploads/1/3/0/7/130776476/6e56156a3bac37.pdf
    • http://files.depedkabankalancity.com/uploads/1/3/1/3/131379054/lafusovab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/pobuxagopusotezar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/84764693738.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/91157344588.pdf
    • https://cdn.shopify.com/s/files/1/0430/9945/5642/files/58783845157.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/46614635992.pdf
    • https://cdn.shopify.com/s/files/1/0435/5755/2277/files/mute_discord_in_obs.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/35338337636.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/82954365583.pdf
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/vudosunafibujegiwer.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/gomadiwirelabuwerakas.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1079/files/message_notification_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/6927540755.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d7.bin
386a2b34fc885cf1cd2bfe7ec185ff1ae7a812e3ce65229e5a9dfd678578c842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 5092 bytes
font_01_sfnt_off00007405.bin
123569ac277a0ccfb928c101c36619d5260adf87d1755bfddae3c5c4f25c0af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7405 11172 bytes
font_02_sfnt_off0000982f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 4324 bytes

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