Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc6e4993a5c6e40…

MALICIOUS

PDF

46.9 KB Created: 2020-08-19 16:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c99b1cfb98c4a105d9489567b9d6a7c SHA-1: b94a63216b4d379646742d20603af38b50eb2405 SHA-256: 1fc6e4993a5c6e40e091807ce92df5af5ad8382ef1db1f46ebc2af6ff00af402
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The embedded link `https://ttraff.ru/pify?keyword=accounting+information+systems+11th+edition+gelinas` is a clear indicator of malicious intent, likely serving as a lure to a malicious site. 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.ru/pify?keyword=accounting+information+systems+11th+edition+gelinas
    • http://files.keilanisweetshack.com/uploads/1/3/1/6/131606533/5769980.pdf
    • http://files.amandazoe.co.uk/uploads/1/3/1/0/131070895/8228841.pdf
    • http://files.shilohsdachicago.org/uploads/1/3/1/4/131482952/9466969.pdf
    • http://files.johnthrasherfineart.com/uploads/1/3/1/1/131164023/gewugagumuziw.pdf
    • http://files.idyllicliving.com/uploads/1/3/2/6/132681342/zimuduna_dozotekavisiran.pdf
    • https://cdn.shopify.com/s/files/1/0434/5020/4316/files/sigulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/inverse_of_a_3x3_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/waseet_alexandria.pdf
    • https://cdn.shopify.com/s/files/1/0432/7876/2139/files/sokaworam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/wididopuzakonus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/bsc_nursing_pgi_rohtak_application_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/76080666566.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/gepinokametitili.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/jajirajabude.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/booty_building_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/58740938239.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_off00006412.bin
eaff379c7dfcb3bab1c1e2a6aab61947b14ba28450d141d22154ef376e025428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6412 5460 bytes
font_01_sfnt_off00007678.bin
23a0bd9dc847050fbe8599219124f89065d4fc04153e2c8dc81a1d427e476446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7678 13076 bytes
font_02_sfnt_off00009fae.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAE 4324 bytes

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