Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9ade677363a413…

MALICIOUS

PDF

38.2 KB Created: 2020-08-22 18:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3726bf4fd251cddbc821f154f364495d SHA-1: 81afe8d2720202e32dfd37ba4f1abe4a56c7c2a4 SHA-256: 9a9ade677363a4135c35c8d6ec87a3002e1278e502a1eb77c2b8cf63448717e9
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links directs to a known malicious redirector service, 'ttraff.com', which is likely used to obscure the ultimate malicious payload. The presence of numerous links, including those hosted on 'cdn.shopify.com', suggests an attempt to distribute malicious content or lure users to compromised sites. The ML classifier strongly indicates 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.com/pify?keyword=lemaire+reporter+bag
    • http://files.wagntailsbakery.com/uploads/1/3/0/9/130969083/43231d639920.pdf
    • http://files.hartmanholistic.com/uploads/1/3/0/7/130776676/xoxew-rafadugi-miroxeg-teviguxogat.pdf
    • http://zoporuda.gruntledcenter.com/uploads/1/3/1/6/131606552/nevolixukogega-fupir.pdf
    • http://files.jonjust.com/uploads/1/3/1/4/131437318/f32d7c18b37cc0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/57103319785.pdf
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/nivazezazeput.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7698/files/how_to_jailbreak_iphone_4_without_computer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/86555382810.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/76992465283.pdf
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/96160974690.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/69329892815.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/kubota_rtv_900_specs.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/tadel.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/adobe_reader_free_download_latest_version.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_off00004aa1.bin
c7b0c9ba2427f96fbd353b221624401ad863f13db5398d1cddc95795c2e8959b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA1 4692 bytes
font_01_sfnt_off00005a8c.bin
44bbc17b371b22f829abf4a7c153e649ba6ab582fa7b8642c2e42decfc3fca23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8C 10424 bytes
font_02_sfnt_off00007e2c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2C 4324 bytes

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