Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ccd8808705b01f4…

MALICIOUS

PDF

47.5 KB Created: 2020-08-25 01:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5601e573f8c558d4ece93520f2c255f6 SHA-1: 4f748cd4403f57f56d27816125fd78e0cf39d70d SHA-256: 6ccd8808705b01f4c2ee29e7907255b19bbaa1eb93e2a64af59d0a7d97dac405
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to the URL's keyword, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing 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=python-+twisted-+web+rpm
    • http://pubawo.cindykollerphotography.com/uploads/1/3/0/9/130969723/vewiku_xewinolaguvav.pdf
    • http://dexidoro.isolahandmadeoriginals.com/uploads/1/3/0/9/130969521/4480132.pdf
    • http://files.wpca.org.za/uploads/1/3/1/1/131164572/1234495.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0446/3860/1379/files/bogleheads_guide_to_investing_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/48142024350.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/jepezisi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/35236397655.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/ladotesesawibomogasazi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5459/4213/files/34304767173.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/ba_second_year_full_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/10782593169.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/xudivisaduvebifimaxukelip.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/71095322486.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/44844242680.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_off0000629e.bin
434d53f66ab92fc61d23e5aff6d8ea0c5a760e7e86d42ef1174c3598b6668753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 5112 bytes
font_01_sfnt_off000073df.bin
db42b2bc86ee2156cd5ca6491d8dda2c6ceecb76c4467a23c23ba7b3f008c611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 15308 bytes
font_02_sfnt_off0000a355.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA355 4324 bytes

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