Malicious PDF — malware analysis report

Static analysis result for SHA-256 0528b4520f408014…

MALICIOUS

PDF

52.5 KB Created: 2020-08-27 22:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6665da783a7c0c6f032869e61e66cee6 SHA-1: 681b70a81e3e2ce5c78b6134ad0f5d94dfee11b0 SHA-256: 0528b4520f408014d51cf6c1421de1c135e4d68886a8f7c012d957f41f8f6b20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text referencing a 'Fluke 62 mini ir thermometer user ma', suggesting a lure to disguise the malicious link. The presence of numerous external PDF links, many pointing to Shopify, indicates a link farm or SEO manipulation tactic to distribute the malicious content.

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.me/pify?keyword=fluke+62+mini+ir+thermometer+user+ma
    • http://files.greenrabbitpress.com/uploads/1/3/2/3/132303245/javiwepanu_vepuzoletaro_sivit_zefemak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/merge_mac_app.pdf
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/fataloropa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/73881890198.pdf
    • https://cdn.shopify.com/s/files/1/0433/4839/4142/files/human_lyrics_killers.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/star_wars_aftermath_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/konsep_bladder_training.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/jimmy_timmy_power_hour_1_vimeo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/arabic_keyboard_free_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/15631966662.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/kadukolopudix.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_off00006d3a.bin
810932136a23a62c3e08fece0c4c833be5578cd12625032e81587e5a8e780dfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3A 6300 bytes
font_01_sfnt_off000082dc.bin
816d34224dab6e3f3cdf8b6898388cb5d5cac0633d69aee64ebee4de77848369
pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 5228 bytes
font_02_sfnt_off00009472.bin
6aa826cd114a7c443551539dbd257c2143d1672496a3c41c3e55bb16d5ffa3c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9472 15776 bytes