Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6e759ec4dee4bd…

MALICIOUS

PDF

35.3 KB Created: 2020-08-11 21:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d13c31c8bf118a614498a430de0ee0b5 SHA-1: 20da76d1344ce1a3722212adcd8f18ba31befa36 SHA-256: 9e6e759ec4dee4bd8b6ea7c42b39eb236f53f7cb34279891e77949c5afde966c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment 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. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially obfuscated, contains the same URL, suggesting an attempt to lure users to this malicious site under the guise of educational content.

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/wb?keyword=continent%20and%20ocean%20map%20worksheet
    • http://zagutezu.eastbrooklynbid.org/uploads/1/3/1/6/131636725/vivufev_wugaw_momubuxur.pdf
    • http://files.puetzerlab.com/uploads/1/3/2/6/132695438/e35e22afb.pdf
    • http://fogunak.joanrowanwatercolourartist.com/uploads/1/3/1/4/131411896/6682557.pdf
    • http://files.doodadsandfandangles.com/uploads/1/3/0/7/130739158/savemasen.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/sojujosesasidixoxunozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/35998287415.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/zujiruvedov.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/que_son_los_alcanos_alquenos_y_alquinos.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8962/files/budaya_jawa_barat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4330/files/understanding_culture_society_and_politics_grade_11.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/craigs_list_kitsap_county_wa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/lorijopokus.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/67170823383.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/sigarerifidifiwux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/imperialismo_colonialismo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/11237839381.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cdd.bin
63fbba3dd36292ac1da140b0c39153b286d0a36752347e5470bb3bf88b015804
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDD 5340 bytes
font_01_sfnt_off00005ee8.bin
69a715a7d6abdc255bfbd06c853ebc5a96cadccfdf5485d9fc74a12445f50b31
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 9856 bytes