Malicious PDF — malware analysis report

Static analysis result for SHA-256 f514cf2531344082…

MALICIOUS

PDF

47.5 KB Created: 2020-08-24 23:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df3f92e1c150e51fa2a65b6ce661231a SHA-1: ee28405a11033341f7cb2a4f065012d38107a41c SHA-256: f514cf2531344082aafc14be0a999588b300d030d077e22495d1d3c0ccac5d3f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as an education board result notification. The embedded URL, https://ttraff.cc/pify?keyword=education+board+result+marksheet+2018+jsc, is flagged as malicious and likely leads to further compromise. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=education+board+result+marksheet+2018+jsc
    • http://files.afihairloss.co.uk/uploads/1/3/1/6/131636956/674994.pdf
    • http://lolalube.petermurraylondon.com/uploads/1/3/1/3/131384714/kedupisiretijib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/kavaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/africa_toto_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/sociologia_da_educao_sonia_kruppa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/lepagipaduvoxepe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/lavataxigadivujowireve.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/jafamoladev.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/luke_bryan_home_alone_tonight.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdf
    • https://cdn.shopify.com/s/files/1/0448/2121/7442/files/sigma_aldrich_chemicals_price_list_2020_17.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/snapchat_for_rooted_device_apk.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/odisha_map_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/christmas_card_template_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7424/files/original_bhagavad_gita_in_marathi.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_off00006c62.bin
ed6ccc7e719f1e69507c366268f282322d0fa255d5c070b4505acec4dbc5b5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C62 5820 bytes
font_01_sfnt_off00007ffa.bin
08ee85146ff204dbc5c6b8ed1f725cf9c390d32ba7fbc5ffe27d210a6037a1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFA 10076 bytes
font_02_sfnt_off0000a273.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA273 4324 bytes

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