Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd8cff5b9d78f88…

MALICIOUS

PDF

48.4 KB Created: 2020-09-01 14:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d031faad2daa5a4b580c9f3024ea784 SHA-1: 2a978a1f109adea96d88d1b01240233b3250f733 SHA-256: edd8cff5b9d78f889002544fd29e0491853f616c352a423798351e43fb1e91a4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a critical heuristic identifying it as a link farm pointing to a known malicious redirector. The document body contains a URL that is also listed as a malicious redirector. This suggests the primary purpose is to lure users to malicious sites through deceptive links.

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=habitat+luxury+home+collection+organic+cotton+sheets
    • https://static.usrfiles.com/ugd/314c35_2371a908cb7943b4bd23b9e73e510e6e.pdf
    • https://static.usrfiles.com/ugd/69b86f_31fc501efa3349c1bc1c58d5771053a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0ec9187d7547169cc924ad384d5531.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4f379460a224a6ead704852a39dfe66.pdf
    • https://static.usrfiles.com/ugd/a18aa6_35cb80bc54374506a3adce967a2ab6ff.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/facebook_mobile_play_store.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/boss_gt_100_owner_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2324/5216/files/what_is_parliamentary_system_of_government.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/grossman_cardiac_catheterization_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/remoderij.pdf
    • https://cdn.shopify.com/s/files/1/0461/9334/4670/files/salamon_tanker_bulker_report_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/tojenifuzibod.pdf
    • https://static.usrfiles.com/ugd/b8c837_771c7bb782ae4ffabacd897664d6389f.pdf
    • https://static.usrfiles.com/ugd/45fd81_fe4b6ac815f447fb8de67c6983346676.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_40d0d9cc76394a40a0a53ed2dac08744.pdf
    • https://static.usrfiles.com/ugd/23e9be_3eae9b78e9224cd599305ca20d9e369d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d8f.bin
ee3ebb81ded9b82ecec04015485edba2ec5d81629400d54d00bc339d98ff8d0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8F 5484 bytes
font_01_sfnt_off00009014.bin
bdf72c5c375b31c7191c205adc8fd04d404a2d767005937ef3da9365846bd748
pdf-font-stream PDF embedded font (sfnt) at offset 0x9014 10560 bytes