Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5eb4f2f4b0596c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-30 13:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be18e30e4266710fa3690746077b46de SHA-1: 818bd6d54695c52da64a5169af949e2b698b6316 SHA-256: 6d5eb4f2f4b0596c7bb1dcb09eb81223ccc0f1427eccc376366b93387668222a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=boca+m%25C3%25A1gica+d'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, one of which is 'https://cdn.shopify.com/s/files/1/0435/6135/3371/files/anisocorie_etiologie.pdf'. The ML classifier also strongly indicated maliciousness. These factors suggest the document's primary purpose is to lure users to malicious sites.

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/wix?keyword=boca+m%25C3%25A1gica+d
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/anisocorie_etiologie.pdf
    • https://cdn.shopify.com/s/files/1/0438/3247/5798/files/pirates_of_the_caribbean_full_score_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/16138925689.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5219/files/north_carolina_driver_s_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/32777373422.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/kingdom_hearts_union_x_keyblade_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/zufepelidevovelur.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/vibagite.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/mavexevigamiwifetapemali.pdf
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/51260143357.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/sir_lawrence_alma_tadema.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/7055366586.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/fedex_freight_uniform_straight_bill_of_lading.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/38974390444.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000606e.bin
9bbf9490f5dbc5480d987904f9b63b9389364f6e00c234a8a7831ccab593eb72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606E 5236 bytes
font_01_sfnt_off00007198.bin
ccea7d3821e82f0bf16ce383f99062f4509faf87fb9344d60a2645ae4ad9cf63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 11224 bytes

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