Malicious PDF — malware analysis report

Static analysis result for SHA-256 e407f5fdb9443fec…

MALICIOUS

PDF

47.1 KB Created: 2020-08-22 12:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c11e94fc09b7fbe6a44caa1daffd2123 SHA-1: d3d12b2773c15f811ee43ef39957ec43d566213d SHA-256: e407f5fdb9443fecc14ac11ed3032cf07759c1a0eb4861bcc3413a1ce180f941
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=nfl+playoffs+2019+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other embedded links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=nfl+playoffs+2019+pdf
    • http://files.rmofparkdale498.com/uploads/1/3/0/8/130873717/318bb3.pdf
    • http://remavevan.en.skandiaorgeln.com/uploads/1/3/1/4/131438304/besasuso.pdf
    • http://febadupi.literature2life.com/uploads/1/3/1/6/131637308/e5d19ab4.pdf
    • http://files.pkhillsassociation.com/uploads/1/3/0/9/130969607/jiwuwut.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/industrial_microbiology_by_le_casida.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/vedotexipafegarowoxonez.pdf
    • https://cdn.shopify.com/s/files/1/0433/2978/1918/files/36846865830.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/i_75_traffic_ky.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9238/files/45284871643.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/zogodasisukarujetonojari.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/adam_driver_the_report_trailer.pdf
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/avira_free_antivirus_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/present_past_future_tense_review.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/wibeli.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/jugud.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/salarupifazogasijetag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/20907774326.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da8.bin
c985029438ad25fff8c6eb44e2f158a1ef9ece0eaad6486418a4c00b5d29f1ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA8 4928 bytes
font_01_sfnt_off00007e73.bin
384e85ec6395e43be4928d54ef4f49585b8e284f6cb35193ebd66eba7aac6cef
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E73 10112 bytes
font_02_sfnt_off0000a107.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA107 4324 bytes