Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b60710672a5393…

MALICIOUS

PDF

52.0 KB Created: 2020-08-23 12:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce1eeefc065e548e0ea18b1bd272302 SHA-1: c63cd6747b2a08d7a1dcc3df44e2d4cdabad380f SHA-256: 49b60710672a539370715e921307ecedf8cbc5ec7dc1f806cdf30126a3b0fd72
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 identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'equality act 2010 explanatory notes pdf' and a URL pointing to a redirector. This suggests a lure to a malicious site, potentially for phishing or malware delivery. 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=equality+act+2010+explanatory+notes+pdf
    • http://files.bristolplanthire.com/uploads/1/3/2/8/132814030/zifis_doniluf_xojatowepet.pdf
    • http://files.infernalcandles.com/uploads/1/3/1/3/131380045/49ec34a.pdf
    • http://vebivej.smallhaus.net/uploads/1/3/0/8/130814328/5181888.pdf
    • http://sumuka.txtsantacruz.com/uploads/1/3/1/6/131606289/7722451.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7018/files/zelda_minish_cap_rom.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/english_to_bengali_converter.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/41567859621.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/kukuzenodejuwenugomupeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/mw3_hacks_xbox360.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/26792280991.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7368/files/classic_cougar_forum.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4104/files/26446378201.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9402/files/dead_or_alive_chords.pdf
    • https://cdn.shopify.com/s/files/1/0462/0048/8089/files/guided_meditation_for_sleep_and_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/64137397136.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/lojido.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_off00008c45.bin
ffc4f42d1cb75147ef58a8293db0db1bf8409d0b874a0a4181c7471600e06375
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C45 5728 bytes
font_01_sfnt_off00009fdf.bin
0a72fb99ef1ab930bd6df3fe1835156f89f0f50205c9c991f04cb3b703ae817e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDF 10192 bytes