Malicious PDF — malware analysis report

Static analysis result for SHA-256 d143edf083cbe677…

MALICIOUS

PDF

48.6 KB Created: 2020-08-04 19:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3800e916a6b52d355ee1fe639c2df865 SHA-1: a1c0bcb5a800486bb8cf7257d3226378a0d62792 SHA-256: d143edf083cbe677b50c4e3a690cea1e2e37481e679414162208db8987a17473
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 firing for a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'certified ethical hacker book pdf download' and the malicious URL. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a lure to a malicious site disguised as a free download.

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=certified+ethical+hacker+book+pdf+download
    • http://files.phoenixnyteachers.com/uploads/1/3/0/7/130775286/9305333.pdf
    • http://files.watersaltbohojewellery.com/uploads/1/3/0/7/130740522/3251459.pdf
    • http://files.theyogatreegardner.com/uploads/1/3/1/3/131398573/1231851.pdf
    • http://files.prayertowercogicgp.org/uploads/1/3/1/3/131384025/mudalodiperobuf.pdf
    • http://files.theyogatreegardner.com/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0431/2452/3170/files/85_monte_carlo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/pulse_width_modulation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/ragaloke.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/59907601031.pdf
    • https://cdn.shopify.com/s/files/1/0438/3506/4480/files/7184121570.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7003/files/invert_colors_in_paint.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/70394154784.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/angulo_central_e_inscrito_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/kobun.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/28065003478.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/82948872588.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/61568457463.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_off00007199.bin
e47b27a179a9f5585cabf293c71b4a7c291c512406b0ce29e48ce5399cd31475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7199 5172 bytes
font_01_sfnt_off0000832f.bin
64794a650352af4766f0a397237deb7eb86f1bfe4ebe1c0ea4129bf6f2e0e3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832F 10416 bytes
font_02_sfnt_off0000a68e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA68E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.