Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efb89090e5f9eea…

MALICIOUS

PDF

108.0 KB Created: 2020-08-14 05:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4d5bfd9f9ce9524490ff613d3817124 SHA-1: e852ed37d4c32a5dc643ebf1a4adc1fdda30a355 SHA-256: 2efb89090e5f9eea2556fdbc264ba48f7581153ad6f1c2782e41aa4500ecf58f
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=orbit+er+%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D8%25B1%25D8%25A7%25DB%258C%25DA%25AF%25D8%25A7%25D9%2586, which is associated with known malicious redirector infrastructure. The document body contains obfuscated text and the identified malicious URL, suggesting a lure for users to click through to a potentially harmful 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.ru/pify?keyword=orbit+er+%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF+%25D8%25B1%25D8%25A7%25DB%258C%25DA%25AF%25D8%25A7%25D9%2586
    • http://wovunetum.coldcreekangus.com/uploads/1/3/1/3/131378960/0ce1c5e046527fd.pdf
    • http://files.switchbricks.com/uploads/1/3/0/8/130814687/710532.pdf
    • http://files.d2photoblues.com/uploads/1/3/1/4/131453252/xivumowizojizoluxoxo.pdf
    • http://solaguwu.holychildcatholicschool.org/uploads/1/3/1/6/131606758/wozeserojewefetariva.pdf
    • http://files.tfmusicparents.com/uploads/1/3/1/6/131637419/8e8939f3.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/gimaxikupijif.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6599/files/local_anesthesia_toxicity.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0247/files/75078720634.pdf
    • https://cdn.shopify.com/s/files/1/0440/4399/3238/files/torinixirijadufu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/monizegofamagovok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.pdf
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/can_opening_a_on_iphone_be_harmful.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/wevilowawomoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/fulibawisagixerog.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/4118379005.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/structural_functionalism_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/19668888583.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_006_off00016523.bin
d2462641bc73acefaad8ff997fb9371651931341305bbf9d78df972dab9cfaed		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16523 33364 bytes
font_00_sfnt_off00011220.bin
06ff6b3c887f2d991c580d01bd0d22e1a53bb2b7cfaae184bfafb37c21e465cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11220 4428 bytes
font_01_sfnt_off00012137.bin
ccb67d4e6d661abb213826ea0b7b9d558a33207388271f18d81a2790b186fa20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12137 16984 bytes
font_02_sfnt_off000139bd.bin
c9fb5e7105c5abc74274f0b44f9dc52707d171fdc059e57fa091bc76fbadae89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 13332 bytes

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