Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee56389ab07ed0e2…

MALICIOUS

PDF

41.8 KB Created: 2020-08-23 12:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d61fbcbeb1568f46813aa49be9638104 SHA-1: fa1c984d99a754e526e5b7c008573e9958357f75 SHA-256: ee56389ab07ed0e23b4fad781dc0d10f4f872e0a3918d3178e2eee47fc42ed63
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though malformed, contains text suggesting a lure related to "math games book pdf" and the malicious URL. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicates a phishing or redirection attempt. 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=math+games+book+pdf
    • http://files.veenalothelaw.com/uploads/1/3/1/4/131407552/gekemuji_tumoma_sojot_kemowijux.pdf
    • http://nafomidaf.aivets2018.eu/uploads/1/3/2/8/132814969/0dddc8bd0e6c00.pdf
    • http://files.sproutsmyanmar.com/uploads/1/3/2/3/132302863/giburapudiga-dojowul.pdf
    • http://lixaluxa.professionalservicescouncilfoundation.org/uploads/1/3/0/8/130813848/a168a695ee675c.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/mevowesusu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9093/4949/files/buchungsstze_bungsaufgaben_mit_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/cara_membuat_tepung_ampas_tahu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/668339115.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/bridge_to_grace.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/chilton_manual_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/80360746168.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/88620792826.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0792/files/35741810323.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_off00006526.bin
f40a82a3f5b4ab92c7bb6b17e4fc484169377a5dceab2dce2a1340d9b936f6f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 5536 bytes
font_01_sfnt_off000077e3.bin
ff146a51be13979ff97edb96293ca7a5fc798497e0229a8271b683ae861e7dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 10316 bytes