Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdfee566cc5bef1…

MALICIOUS

PDF

46.1 KB Created: 2020-08-13 15:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e60889103a60c580c51243574071016 SHA-1: 0d38fe5a2f66e7b78933151a666228d1d1435239 SHA-256: abdfee566cc5bef1cb052bef6314036da22cb017a3cdde1c27ba91891fc075f0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a large number of external links, many of which point to potentially malicious redirectors or SEO link farms. The primary malicious URL identified is https://ttraff.cc/pify?keyword=barayti+ng+wika+at+mga+halimbawa+pdf, which is a known redirector. The document body contains garbled text and embedded URLs, suggesting it is not intended for legitimate user consumption but rather for link manipulation or redirection.

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=barayti+ng+wika+at+mga+halimbawa+pdf
    • http://gejos.scacademyofauthors.com/uploads/1/3/0/7/130776661/82b2a311.pdf
    • http://ruzezozo.lwvlcf.org/uploads/1/3/1/3/131380029/4810647.pdf
    • http://files.whistlingfrogresort.com/uploads/1/3/2/6/132681002/masaberilanimubaloji.pdf
    • http://wivonox.jaipurelephantpolo.com/uploads/1/3/0/8/130814729/646fa305acd346.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/vinaduvani.pdf
    • https://cdn.shopify.com/s/files/1/0428/5644/8156/files/10567161119.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/carnet_de_sant_bebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/revised_common_lectionary_year_b.pdf
    • https://cdn.shopify.com/s/files/1/0447/8818/7293/files/microsoft_free_domain_name.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/tekobezobo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/1980_ford_f100.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71895705060.pdf
    • https://cdn.shopify.com/s/files/1/0436/3275/4841/files/37914682102.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/31541836996.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/28769071953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977390730.pdf
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/73069966179.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683f.bin
cf373f8eb364677dc8d29ae0cbe658a1b8665e9067f0cd69b3a2e84d4b370a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 1872 bytes
font_01_sfnt_off00007133.bin
b1903ff8b773e5daca283179a708826d5fe5a6acf622ece7e8097ce854084d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7133 5724 bytes
font_02_sfnt_off000084a1.bin
036f67a46626137fb62dd617598dce441a984fd2ad6e7a04d06feb666dfff127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A1 10880 bytes

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