Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9c7d342936301b…

MALICIOUS

PDF

49.9 KB Created: 2020-08-06 20:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df329f1140fddf7fa004e00fd3a22585 SHA-1: 1968e2d9a108f1b8daa653162f44025c59a4ca15 SHA-256: 1e9c7d342936301b8b65c07a0287a8d8e37053f898e4e5d5d1cae8e6f1b63a63
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to potentially malicious redirectors like 'ttraff.cc'. The ML classifier strongly indicated maliciousness. The embedded URLs suggest a phishing or malware distribution attempt, leveraging a large number of links to obscure the malicious destination. 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.cc/pify?keyword=soal+asking+and+giving+opinion+pdf
    • http://duwisizek.seekingkali.com/uploads/1/3/1/3/131380429/wisorin.pdf
    • http://fobeda.cubatrips.ca/uploads/1/3/0/7/130738731/vumefita_gobokofusasu_xebasuvoruxewo.pdf
    • http://files.fullmoonfarmnc.com/uploads/1/3/1/4/131437949/5639821.pdf
    • http://files.skimoeast.com/uploads/1/3/1/8/131856125/91cf5.pdf
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/25794816907.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/zuvatebijepolezesotir.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/valithria_dreamwalker_solo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2711/files/vobuxuneta.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/biblical_meaning_of_numbers_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/99197718728.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9768/files/ganpati_atharvashirsha_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/6282/0005/files/38908279252.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/dawoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/bluetooth_low_energy_5._0_specification.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/dazavem.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7743/files/54816965215.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/jenowiweze.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_off000078fd.bin
c31ea8d66520c311cab5a70041c1d6d882ea06df54689541b2699e13ba26e8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FD 4928 bytes
font_01_sfnt_off000089c2.bin
a8dbb21484efec2d3eb8c329bfa7c0456aa89020accc6d0c9a360e0243b958a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89C2 9976 bytes
font_02_sfnt_off0000abd0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD0 4324 bytes

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