Malicious PDF — malware analysis report

Static analysis result for SHA-256 07941d16ad0a3410…

MALICIOUS

PDF

55.3 KB Created: 2020-08-29 02:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33468efd6b3ac841343720ba5235715c SHA-1: 7cec78f9bf87fd5d5d1824c636886a8ee7a61b72 SHA-256: 07941d16ad0a3410c51d22a974b6e98670e95ac002fbd997bd1871da54c462ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, with a critical heuristic firing indicating that it points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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/wix?keyword=%25E0%25B8%25A7%25E0%25B8%25B4%25E0%25B8%2598%25E0%25B8%25B5%25E0%25B8%2597%25E0%25B8%25B3%25E0%25B8%2584%25E0%25B8%25A7%25E0%25B8%25B2%25E0%25B8%25A1%25E0%25B8%25AA%25E0%25B8%25B0%25E0%25B8%25AD%25E0%25B8%25B2%25E0%25B8%2594+yak+%25E0%25B9%2580%25E0%25B8%2584%25E0%25B8%25A3%25E0%25B8%25B7%25E0%25B9%2588%25E0%25B8%25AD%25E0%25B8%2587%25E0%25B8%25AB%25E0%25B8%2599%25E0%25B8%25B1%25E0%25B8%2587
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/3572292881.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/dolobazerusigisadogasilog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/linarutaponesokov.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/88261449875.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/34362998977.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/32320041830.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/selufidorejepemori.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/zefelavapobegabewunosoka.pdf
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/34137995802.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/dark_cloud_2_weapon_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/86197677897.pdf
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/92486208575.pdf
    • https://cdn.shopify.com/s/files/1/0462/4846/0439/files/ark_how_to_force_tame.pdf
    • https://cdn.shopify.com/s/files/1/0433/7804/9189/files/51181469687.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/que_hacemos_con_estos_musicos.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007602.bin
4492219cbde15db4bf471b3783c9d536f55e60f9c64509a5c9252ff7ec774a29		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7602 17132 bytes
font_00_sfnt_off0000503b.bin
b0110761045e7e5f8ab232fb9c836279d3a1e57149e0cdbe9ab272a8fa93ac14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x503B 3768 bytes
font_01_sfnt_off00005cd2.bin
ee7bbc83c8770e862e8bd2430752936972dc263b23dc1f9e8b966aad0068e6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 9412 bytes
font_03_sfnt_off0000a38c.bin
32ccb4adcbe2ce76d0190d54110cff7a34bc52f81dc50f0ee88f21edf828e95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA38C 7620 bytes
font_04_sfnt_off0000bd23.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD23 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.