Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fe361c96c59c5a…

MALICIOUS

PDF

65.7 KB Created: 2020-08-21 21:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 669d3c66c2c2792c5ef7636ed76ace60 SHA-1: 344159a4341be65c49b0fa5ac7c42f4d46c4c996 SHA-256: b0fe361c96c59c5ac3d173036d620d6c7915e22dde102707da34575effd9a1ce
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link is presented as a lure related to 'Honkai Impact 3' game guides. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Heuristics 3

  • 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.
  • 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=honkai+impact+3+guide+weapons
    • http://files.christophernewhook.studio/uploads/1/3/1/4/131483955/f93166c19d67.pdf
    • http://nuperof.emeraldtraceonline.org/uploads/1/3/0/8/130814328/gikujikediferu.pdf
    • http://files.miriammccormick.com/uploads/1/3/1/4/131437106/wugijogijagil.pdf
    • https://cdn.shopify.com/s/files/1/0451/1550/6853/files/levowogif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mokotutirajozejimus.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/arduino_ide_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/fishing_report_colorado_river_matagorda.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/93760658452.pdf
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/47288422869.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/mcquarrie_statistical_mechanics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/samsung_ce0168_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/r_markdown_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/4882/8065/files/dokopejolofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/22294429494.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/bivek.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b907.bin
d8355b8d3280f25e6cc5451fc085b4b9b5b3f08fc541faab607c055bf91be6e5
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB907 9380 bytes
font_00_sfnt_off00008301.bin
4c50439f55e07e6e7e57abc90cd193965040b12670aaec5dedee5e6877d9ab3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 10636 bytes
font_01_sfnt_off0000a63a.bin
30c6bdf7223431a26134ee0655b918da22f023fbc80d839df585dc93d86b2aca
pdf-font-stream PDF embedded font (sfnt) at offset 0xA63A 5548 bytes
font_03_sfnt_off0000d329.bin
1560e2003d301a7c15cc4d11530837dab40d22b3cfe407080f5306e08b5f6717
pdf-font-stream PDF embedded font (sfnt) at offset 0xD329 12116 bytes