Malicious PDF — malware analysis report

Static analysis result for SHA-256 38123903c2016460…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 06:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325bd559027818707ffcf37174c52bcb SHA-1: 9cf64a7c85212605af3a2b398f887aa935c290e9 SHA-256: 38123903c2016460ff1e4c0964e49b1d4ff26c5ebc1e2b457777d8f8fa4c1d4b
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a movie download. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and text related to movie downloads, reinforcing the lure. The presence of a link farm further indicates malicious intent.

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=rockstar+full+movie++480p+movies+counter
    • https://static.usrfiles.com/ugd/b8c837_528edf90f4e54b988b0956dccf9e278c.pdf
    • https://static.usrfiles.com/ugd/6da380_1c84d384d4d64d509e18266553cc9af1.pdf
    • https://static.usrfiles.com/ugd/b8c837_895bc1339dad4deebd748217b346c316.pdf
    • https://static.usrfiles.com/ugd/de02f3_aafc4396f65e4bd8b9ec36d6ab5961e3.pdf
    • https://static.usrfiles.com/ugd/8de238_951f8c6825e2479d83b6c709053a896b.pdf
    • https://static.usrfiles.com/ugd/07625c_7609c9cbd0bf449dbc76aea968639032.pdf
    • https://static.usrfiles.com/ugd/e4ff69_55d0d03041bd45ddb24d9baf19b53515.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f198ce42f4ed4e65a09f34863684b1e3.pdf
    • https://static.usrfiles.com/ugd/576447_125ccf5d6dc04cb0ba5aff6cfe268714.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/fogoxevikam.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/incident_at_absalom_station_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/skate_2_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/all_emoji_meanings_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8037/files/wajipewepufuwoxa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651f.bin
34c8b21238895bca563cf37e4442304f3da8f73bd32cb42fd140c2853f1d79f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 5600 bytes
font_01_sfnt_off00007818.bin
734e698b9fbcb2e791118e41a0b70700e068fa3dedba10ebc7e09b045ca56e59
pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 10768 bytes
font_02_sfnt_off00009cbd.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBD 4324 bytes