Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a90abb7d93b109b…

MALICIOUS

PDF

53.6 KB Created: 2020-08-18 22:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f50e69cb23e375584a00292a27f3a259 SHA-1: 5a4eb0090de299619aab7e9ceb78e9054c7587cb SHA-256: 3a90abb7d93b109b11d5e59aaa4ef17ece7bb55873f48ba36e3e83024dbd65a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, including a critical finding for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the PDF is designed to lure users into clicking malicious links, 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=las+mejores+aplicaciones+pagas+para+android+2017
    • http://files.ivepetthatdog.com/uploads/1/3/0/9/130969545/a4a29060e4bd5.pdf
    • http://files.ohioaux.com/uploads/1/3/0/7/130739456/17d79a5c52.pdf
    • http://files.lajuanaradcliffe.com/uploads/1/3/0/7/130739383/6348703.pdf
    • http://vezezuri.electricscooterrentalorlando.com/uploads/1/3/0/9/130969465/6296e671489dc.pdf
    • http://files.languageartswitmsbell.com/uploads/1/3/0/7/130776037/37690.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6057/files/anticipation_secret_garden_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/kalnirnay_calendar_september_2020_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/tojolobusapokutawux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/sesajupubibukotazos.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/38570845754.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8723/files/40750665118.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/40651302221.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/66846413780.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/microsoft_excel_2020_core_certification_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/chemistry_of_polycyclic_aromatic_hydrocarbons.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/12965342809.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vufofabiziterefabul.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/renanevupafevegojap.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_off000080c4.bin
78c79ed20ca040d5725593f016b57aafdcd765659abe62689ebbda78863bb0a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C4 5524 bytes
font_01_sfnt_off0000937a.bin
3a698d4c5ea7406cd76339b1b111db4af260d82f61780365c338b59f800e7e3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x937A 11332 bytes
font_02_sfnt_off0000b865.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB865 4324 bytes

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