Malicious PDF — malware analysis report

Static analysis result for SHA-256 15eda7ab4f1b3d23…

MALICIOUS

PDF

46.4 KB Created: 2020-08-27 12:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84c397ab19c7713a581b07deda0bce63 SHA-1: 1a54dbb66f9194c8ab7eb3374d1c3b37d552aee4 SHA-256: 15eda7ab4f1b3d23a9103b2db29a465ce9e108ce8e4ff5af0f2110a1f3261de0
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector, disguised as a movie download. The document body and embedded links suggest a lure to trick users into visiting malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful 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.ru/pify?keyword=jalebi+full+movie+in+hindi
    • http://files.ck-monuments.com/uploads/1/3/0/8/130874691/17059.pdf
    • http://nibeta.neworleansartreview.org/uploads/1/3/1/6/131606490/kazugoxerufaza.pdf
    • http://tukasova.kalonhuett.com/uploads/1/3/1/1/131164110/vinuw-bowiw-sutezewafeb-pazerukoze.pdf
    • http://jinow.hikesdelmon.com/uploads/1/3/1/4/131406592/81fb1.pdf
    • http://xafes.lhouette.com/uploads/1/3/1/0/131070109/tuponapabo_suremokeki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6292/7263/files/stihl_ms_250_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7590/3383/files/clinical_microbiology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/wafot.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/69645164702.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/jnu_admission_result.pdf
    • https://cdn.shopify.com/s/files/1/0436/5674/1022/files/the_science_of_accelerated_learning_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4275/8053/files/kafodedugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10699911966.pdf
    • https://cdn.shopify.com/s/files/1/0434/4561/6792/files/fukoruxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/zizawixixofazogadawopog.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/xired.pdf
    • https://cdn.shopify.com/s/files/1/0432/6434/4219/files/dibels_next_free_s.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff6.bin
d5d70b49e17bfcad537b7c4ac2edbcca3c298fe130acbc29749e7f1648d94243		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF6 5064 bytes
font_01_sfnt_off0000710f.bin
6d52d61d940fec262ccf7e7700d7e9e305c661a1be89427d19fa0672344b9ae6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710F 11460 bytes
font_02_sfnt_off000096f8.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F8 16164 bytes

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