Malicious PDF — malware analysis report

Static analysis result for SHA-256 644cea29df1b42c4…

MALICIOUS

PDF

67.1 KB Created: 2020-08-11 20:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83d018cdb73247c3427301c226f0cdda SHA-1: bcc22bedac5620752c4c0f641a5f188504202fda SHA-256: 644cea29df1b42c42e9a07a96a1a4189000625f98127e81eecd15523a08a3cce
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=ajax+tutorial+pdf+with+examples, suggesting a lure to disguise the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to host further malicious content.

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=ajax+tutorial+pdf+with+examples
    • http://files.impulsehair.com/uploads/1/3/0/8/130874583/927c94869dcd5d8.pdf
    • http://files.nhlogcabinrental.com/uploads/1/3/0/7/130776590/b6cfdd137aade.pdf
    • http://files.liveonlinetoursoftheworld.com/uploads/1/3/2/6/132681749/c2e019d.pdf
    • http://files.cupanifashion.com/uploads/1/3/1/4/131409761/zejafitopalusadaxima.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/34926927621.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/rozidopidomopoxudafazino.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/working_of_2_stroke_si_engine.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/19786178473.pdf
    • https://cdn.shopify.com/s/files/1/0440/0798/1214/files/89593011427.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/7160087702.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/8188897524.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/nosuga.pdf
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/etc_folder_windows.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/56141696290.pdf
    • https://cdn.shopify.com/s/files/1/0437/1221/7241/files/65956139328.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/zesuvelefebepopa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/26926754491.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_off0000ba85.bin
d0303f95c2fe3822aaacd2efcf3a9b2ab00d5751923ef36f7101934ff173f4f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA85 5508 bytes
font_01_sfnt_off0000cd3b.bin
3df8efc52e198678d6c0f62b2c37ad5aff27cef4b90c9060740eb50339fa166b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 16116 bytes

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