Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f1567342eeebc9…

MALICIOUS

PDF

48.4 KB Created: 2020-08-08 21:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4028f135b3bdf3a0fbeb35784cbc2e19 SHA-1: 270943fe02af80747b23493c0d8fe7da4008de2d SHA-256: 02f1567342eeebc91ebc115661cad4d0aef6238ccd31cce0a93a656426aaf87d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for a dictionary PDF. The presence of numerous external links suggests a link farm or SEO manipulation tactic.

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=hat+afrikaanse+woordeboek+pdf
    • http://files.janetbabymom.com/uploads/1/3/0/7/130775537/b473f8cc3.pdf
    • http://files.river-city-wings.org/uploads/1/3/1/8/131856907/50048ec9e.pdf
    • http://files.myfiorella.com/uploads/1/3/0/7/130739312/lavozu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/82984291772.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/wifi_to_ethernet_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/kosewavepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/14187611874.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/9510575821.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/35893861932.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/32323514784.pdf
    • https://cdn.shopify.com/s/files/1/0435/4487/1063/files/vexojanolujadesezegaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2111/files/rijomep.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/24204709819.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7383/files/bncc_do_ensino_medio.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/74005326684.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071c1.bin
e052a00254d09955b02c5fd46196d0b0343adc05136e4c0003c4a09c86bf446f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C1 5048 bytes
font_01_sfnt_off000082ff.bin
4f03d6b6ae672474a2b7290bebbf87c001c04d9b8ad59db3651980ac0f5cd952
pdf-font-stream PDF embedded font (sfnt) at offset 0x82FF 10708 bytes
font_02_sfnt_off0000a6f8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F8 4324 bytes