Malicious PDF — malware analysis report

Static analysis result for SHA-256 095cdf63d824756c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 06:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4440f48d2b34b4765fe6170af28d345f SHA-1: 86259d9f34abe497b7af4800e9ed47543d533003 SHA-256: 095cdf63d824756c4fabe1f33bc7c2d6f7100330646138e47bfb0521777899b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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=dress+code+semi+formal+mujer
    • http://files.theharbourvoice.org/uploads/1/3/1/0/131070754/b39471dbf8.pdf
    • http://zunijalaw.dctest.org/uploads/1/3/1/3/131398404/gumobividujagi.pdf
    • http://zofajale.warringahtriathlonclub.com/uploads/1/3/0/8/130874043/zulifigixati_mavekewojaf_vabaxupuli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/fekupukibojoxafak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9362/2935/files/welixosopajomubugow.pdf
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/cfa_material_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/6512695304.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/dekufubewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdf
    • https://cdn.shopify.com/s/files/1/0451/8585/9735/files/gaxazagadujexamopanerun.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2876/files/bharat_ko_jano_2020_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2304/8609/files/d_l_w_ka_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/bepantol_creme_bula.pdf
    • https://cdn.shopify.com/s/files/1/0438/5990/2624/files/38464270995.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/xavojerugawubunog.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_off000068e2.bin
990176f2a2850b3438324a6c33a8dbc88e497a505043dd8767736f54f547933a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E2 5240 bytes
font_01_sfnt_off00007a98.bin
29c9f697f7a3cea955c4e3219d8601cd2910056f8e2718627472473c169bfcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A98 9852 bytes

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