Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aeed1962a55008d…

MALICIOUS

PDF

43.2 KB Created: 2020-08-14 18:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 279cc9d64b090fae3f4f1037583e6324 SHA-1: 6dcc35a91cae7515db647839c5094a7767185ca6 SHA-256: 0aeed1962a55008ddec5bccfb486f4a6c05a4689709b728fb374d32ed1b18793
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The document body, though heavily obfuscated, contains a URL that appears to be a redirector. The presence of numerous external PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=zalo+m%25E1%25BB%259Bi+nh%25E1%25BA%25A5t+cho+pc
    • http://fizuzepiz.partainsenglishclass.com/uploads/1/3/0/7/130775732/4686999.pdf
    • http://files.phinedesign.store/uploads/1/3/1/3/131383657/gizekazavaxokasuzasu.pdf
    • http://files.deyrecreativedesignsexpressions.com/uploads/1/3/1/0/131070313/lomijubuwiwudop_nudemifutobovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/21493539403.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/atomx_virtual_dj.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/arduino_android_app_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/79867383084.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/bebegeditol.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/fe_warriors_characters.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2323/files/9318700855.pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/gederomuvugowakobosak.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/arifureta_light_novel_vol_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/size_36c_breasts.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/viwexosarekit.pdf
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/politique_linguistique_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0439/2629/0587/files/21050709346.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aab.bin
ab26f5e3fb9228aa5115e1bbef97f188fee979bfd46b3e52c3c69b10362ef4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 5280 bytes
font_01_sfnt_off00007bd8.bin
9c25760bbfadcbb73663c09246ff2054480c28a694546c9477e2814cc9a99031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 10352 bytes

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