Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e91e1b50a0b207f…

MALICIOUS

PDF

44.2 KB Created: 2020-09-08 00:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a046c1a0a503ad6bee751494712c481 SHA-1: 59e4de8bd42b0c2c0bee740a999f97285436d9ac SHA-256: 5e91e1b50a0b207f695ce766af145a352cef24ddd3c699daa70085be46701cb3
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=free++template+daftar+riwayat+hidup'. This URL is presented as a free template download, but analysis indicates it leads to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector and the document's deceptive content suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.me/wix?keyword=free++template+daftar+riwayat+hidup
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/youreporter_napoli_oggi.pdf
    • https://cdn.shopify.com/s/files/1/0448/4818/5501/files/bukhari_sharif_hadees_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/doctoral_program_in_accounting_reporting_and_taxation.pdf
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/78583236383.pdf
    • https://static.usrfiles.com/ugd/ba3095_a5fb5b5ea3c046198caac4ea4a45b3a2.pdf
    • https://static.usrfiles.com/ugd/83e24f_ea10de668da843e2945ae766f7eaa3d6.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/13571287954.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/arijit_singh_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/29923827871.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4097/files/36210102400.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/borland_delphi_4_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/ceroplastes_floridensis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/adda247_current_affairs_april_2020.pdf
    • https://cdn.shopify.com/s/files/1/0467/7753/2569/files/26154782820.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/xigijilo.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_off00006e2f.bin
8c3c5131e7fbf6b53d3b99afee9a22ae0fd527d598ad37bb21c04d4669dcd803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2F 5252 bytes
font_01_sfnt_off00007ff7.bin
22d018621855d43869d9b2ee0b932987de2323692f2159f158ecab0ffebb6076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF7 10504 bytes

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