Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32daa7eea298105…

MALICIOUS

PDF

41.5 KB Created: 2020-09-17 01:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e023af603238195d45355bf9a5d30dcd SHA-1: b85a0db5c789837997b30aecaa1368edc9a046cb SHA-256: b32daa7eea298105f110e30416293555f1cb38dc1065abcc48861e75cc687766
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains text related to 'cracking the money code trading pdf manual', suggesting a lure to entice users to click the malicious link. The presence of numerous Shopify links, while many are benign, indicates a potential link farm strategy to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=cracking+the+money+code+trading+pdf+manual
    • https://cdn.shopify.com/s/files/1/0434/2890/5127/files/video_twitter_tanpa_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/tunelevedozodewebasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/19207647409.pdf
    • https://cdn.shopify.com/s/files/1/0435/4850/8311/files/aadhar_card_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/54658264171.pdf
    • https://cdn.shopify.com/s/files/1/0450/7552/9891/files/apostrophe_worksheet_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/16160486716.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6874/files/tweakbox_app_slow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3553/3218/files/prontuario_cemento_armato_santarella.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/tibisafazisonoruz.pdf
    • https://b45d1d4f-8480-4a00-a4b7-145408e722ee.filesusr.com/ugd/b7306e_1b46bf297f4a407792c92736065e0fad.pdf?index=true
    • https://43faa5e8-fbb1-4417-a1a2-20b363750730.filesusr.com/ugd/7603ae_5fc36482b36f469580f17e474fbbb137.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/85849011631.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/68195501571.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c3.bin
98cae60e3f884ae13742104483ef0fece5a364d3def7d6983d63290eb17d405e
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 5460 bytes
font_01_sfnt_off00007531.bin
d384b74c0cded260c6338fc1a8320e7fcf5a26f87e8e7c6bf48c8362d3860270
pdf-font-stream PDF embedded font (sfnt) at offset 0x7531 10560 bytes