Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3707e032d1d648…

MALICIOUS

PDF

53.4 KB Created: 2020-08-16 01:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ba7da27710537cfae69a4fd2f6b8a65 SHA-1: e68d55edcd420da63cbdb0f3bd39a92ee1851176 SHA-256: 5d3707e032d1d648d417cd7fa7f60f16812bed8c1fec42096984052f1bb64b47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm designed to attract traffic. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious redirection attempt.

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/pify?keyword=chief+architect+x3+library+free
    • http://files.nursevisit.org/uploads/1/3/0/7/130775156/9862570.pdf
    • http://files.americanaef.org/uploads/1/3/1/3/131380322/vibumavokuwudo.pdf
    • http://pixexuw.plumbingsolutionsidaho.com/uploads/1/3/1/0/131070571/vivibi.pdf
    • http://files.westcommunityconnect.com/uploads/1/3/0/7/130775632/2720228.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/rabepagaboligugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/24296200638.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7471/files/69502076566.pdf
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/guia_ceneval_contaduria.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/antifouling_paint_biocides.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/60365541642.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7776/files/konizemazoxi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/pemezelirosifaji.pdf
    • https://cdn.shopify.com/s/files/1/0449/9701/7768/files/accounting_and_reporting_of_financial_instruments.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000843a.bin
681b8713324c70ef69b7f3b9f5c0402e23cf2b562f1c4eb9eb7dbf23b12c4d3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x843A 4860 bytes
font_01_sfnt_off000094e3.bin
6023c2c0904d12e18dbf8c99b34d9b8b9a70106a5d2d899089a3e2238fd53998
pdf-font-stream PDF embedded font (sfnt) at offset 0x94E3 11096 bytes
font_02_sfnt_off0000bade.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xBADE 4324 bytes